Yes. Infected Culex mosquitoes can transmit West Nile virus (WNV) to people in Los Angeles. They acquire the virus from infected birds and pass it on when they bite. Los Angeles County says this mosquito type is found throughout the county, so transmission is possible anywhere in the county, although not every mosquito is infected and most bites do not cause WNV infection.
The practical response is a layered one: use an EPA-registered repellent, cover exposed skin around dawn and dusk, keep window and door screens intact, and eliminate standing water at least weekly and after rain. The following guidance explains the current local situation, who is most at risk, and what to do if illness develops.
As an Amazon Associate I earn from qualifying purchases.
Is West Nile virus in Los Angeles right now?
Los Angeles County reported 100 human WNV infections by September 21, 2026. That was the county’s highest count reached by that point in nearly a decade, although it was still a season-to-date figure that could change as additional cases were identified. For comparison, the county recorded 268 cases during the entire 2017 season.
What’s actually slowing this PC down?
Pick the symptom - the matching free tool is one click away.
| Report and date | What it reported | How to interpret it |
|---|---|---|
| Los Angeles County update, September 21, 2026 | 100 WNV infections so far in 2026 | Provisional, season-to-date total; the county described it as the highest count by that point in nearly a decade |
| Los Angeles County release, July 13, 2026 | First reported 2026 human case; the resident was hospitalized with WNV encephalitis after symptoms began in late June | Shows that severe neurological disease had already occurred locally during the season |
| Los Angeles County release, August 20, 2026 | First local WNV death of the 2026 season | Death resulted from severe neurological illness |
| Los Angeles County final 2025 report | 22 human infections and 2 deaths in the county | Final retrospective count, not interchangeable with the provisional 2026 total |
| California, 2025 final report | 113 clinical cases statewide | State total for the completed 2025 season |
| United States, 2025 final report | 2,076 clinical cases nationwide | National total for the completed 2025 season |
These numbers describe reported infections or clinical cases, not the number of mosquito bites. County surveillance is seasonal, and totals can be revised as laboratories and health departments receive reports.
#1 Best Overall
- Read Before You Buy — No Video Output: These adapters support charging and USB 2.0 data transfer, but cannot transmit video signals. Except for standard USB webcams (which use USB data only), they are not compatible with HDMI/DisplayPort cables, video-capable USB-C hubs, or docking stations with video output.
- Convert USB-A Ports to USB-C: Designed to connect USB-C earphones, cables, flash drives, card readers, and other USB-C accessories to standard USB-A ports. Plug-and-play with no drivers or software required.
- Aluminum Alloy Housing: Built with a sturdy aluminum alloy shell that aids in heat dissipation and protects against daily wear and scratches. Designed to maintain a stable and secure connection.
- Compact & Travel-Friendly: The ultra-compact design allows the adapter to stay plugged into your device without blocking adjacent ports or adding bulk, reducing wear and tear on your original USB ports.
- 12-Month Warranty: Backed by a 12-month manufacturer warranty for peace of mind. Designed to meet strict quality control standards for reliable everyday performance.
How mosquitoes spread WNV
The bird–mosquito–human cycle
California’s main WNV vectors are Culex mosquitoes. A mosquito becomes infected after feeding on a bird carrying the virus. Once the virus multiplies inside the mosquito, a later bite can transmit WNV to a person. The county’s statement that these mosquitoes occur throughout Los Angeles means residents in every part of the county should use the same basic precautions; it does not mean infection risk is equal at every address.
When activity is greatest
WNV is encountered most often in summer and early fall, when transmitting mosquitoes are active. The California Department of Public Health (CDPH) identifies dawn and dusk as especially active periods for mosquitoes that spread WNV. Outdoor exercise, gardening, dog walking and evening gatherings during those hours warrant extra protection.
Other routes are unusual
CDPH notes rare transmission through blood transfusions, organ transplants and from a pregnant mother to her baby. The blood-transfusion risk is very low and should not deter an emergency or medically necessary transfusion. Ordinary household contact, sharing food and water, and being near someone with WNV are not the mosquito-bite route described by public-health guidance.
Free tools Windows power users keep installed
One-click scans. No signup required.
Rank #2
- 5-in-1 USB-C Hub: Experience comprehensive connectivity featuring a Power Delivery input, two USB-A 2.0 ports, a USB-A 3.0 port, and an HDMI port. (Note: The USB-C power delivery input port is only for connecting an external wall charger to power your laptop and cannot power peripheral devices.)
- 90W Pass-Through Charging: Achieve optimal charging with 90W pass-through power to your laptop, supported by a total input of 100W, with the hub reserving 10W for operational efficiency. (Note: Wall charger not included.)
- Quick Data Transfers: Accelerate your productivity with rapid data transfers using a high-speed 5Gbps USB 3.0 port and two 480Mbps USB 2.0 ports.
- 4K HDMI Display: Enhance your visual experience with a hub capable of delivering 4K resolution at 30Hz in both mirror and extend modes. Please note that this hub is compatible with MacBook (macOS 12 and newer), Windows 10 and 11, ChromeOS, and laptops equipped with DP Alt Mode and Power Delivery. Note: This device is not compatible with Linux.
- What You Get: Anker USB-C Hub (5-in-1, 4K HDMI), welcome guide, 18-month warranty, and our friendly customer service.
Symptoms and who is most vulnerable
Most infections cause no symptoms
CDPH estimates that about four out of five infected people have no symptoms. About one in five develop an illness that can include fever, headache and body aches. A person can therefore have WNV without realizing it, while a symptomatic illness can resemble many other infections.
Severe neurological disease
A smaller number of patients develop inflammation of the brain or surrounding tissues, including encephalitis or meningitis. Warning symptoms can include a severe or worsening headache, high fever, confusion, unusual drowsiness, weakness, stiff neck, tremors, seizures or difficulty moving. These symptoms require urgent medical evaluation; do not wait for a mosquito test or attempt to diagnose WNV at home.
Higher-risk groups
CDPH identifies people aged 55 and older as having the greatest risk of severe symptoms. It also lists people with certain conditions, including cancer, diabetes, hypertension and kidney disease, as well as organ-transplant recipients. Los Angeles County materials use a slightly broader description, referring to older adults (including people over 50) and people with health problems. The agencies’ age wording is not identical, but both emphasize increasing risk with age and underlying illness.
Rank #3
- Sleek 7-in-1 USB-C Hub: Features an HDMI port, two USB-A 3.0 ports, and a USB-C data port, each providing 5Gbps transfer speeds. It also includes a USB-C PD input port for charging up to 100W and dual SD and TF card slots, all in a compact design.
- Flawless 4K@60Hz Video with HDMI: Delivers exceptional clarity and smoothness with its 4K@60Hz HDMI port, making it ideal for high-definition presentations and entertainment. (Note: Only the HDMI port supports video projection; the USB-C port is for data transfer only.)
- Double Up on Efficiency: The two USB-A 3.0 ports and a USB-C port support a fast 5Gbps data rate, significantly boosting your transfer speeds and improving productivity.
- Fast and Reliable 85W Charging: Offers high-capacity, speedy charging for laptops up to 85W, so you spend less time tethered to an outlet and more time being productive.
- What You Get: Anker USB-C Hub (7-in-1), welcome guide, 18-month warranty, and our friendly customer service.
There is no specific treatment for WNV disease and no vaccine to prevent infection, according to the county’s 2026 releases. Clinicians provide supportive care and manage complications, so prompt assessment is important when concerning symptoms appear.
Recommended Free Tools
Precautions that reduce bites and breeding
1. Apply an EPA-registered repellent outdoors
Choose a product registered with the U.S. Environmental Protection Agency and follow its label for where, how much and how often to apply it. Los Angeles County lists DEET, picaridin, IR3535, oil of lemon eucalyptus (OLE) or para-menthane-diol (PMD), and 2-undecanone. CDPH specifically lists DEET, picaridin, oil of lemon eucalyptus and IR3535. The label is the authority for age restrictions, reapplication and use with sunscreen.
Do not substitute a bottle of pure essential oil for a formulated repellent. Los Angeles County says “pure” oil of lemon eucalyptus that is not made and registered as an insect repellent has not undergone the same validated testing and is not registered with the EPA for that use. When comparing products, look at the active ingredient, EPA registration, label directions and the protection duration stated for the intended user; the available guidance does not establish one brand or ingredient as universally best.
Rank #4
- Dual Converters, Infinite Potential：Includes 2× USB C male to USB A female adapters and 2× USB A male to USB C female adapters. Perfect for a wide range of uses—tablets with Bluetooth keyboards, expand USB ports on macbook, and more. Two different converters for all your daily needs
- Next-Level 10Gbps & 3A Charging: No more slow 480Mbps, this usb to usb c adapter has a transfer speed of up to 10Gbps, allowing you to do more transferring in less time. This usb adapter fits both USB A and USB C charger, supporting up to 3A fast charging
- Upgraded Exquisite Craftsmanship: With an aluminum alloy housing and metal connector, the usbc to usb adapter is extremely durable and sturdy. Rigorously tested to withstand more than 10,000 times of plugging and unplugging, ensuring long-lasting performance
- Broad Compatible: The usb c to usb adapter widely supports all USB C/ USB A devices like laptops, tablets, cellphones, car chargers, and phone chargers. Such as compatible with MacBook Pro/Air 2023/2022, Thunderbolt 4/3 Devices,Apple MagSafe Watch 9/8/7/SE/Ultra, iPad Pro 2022/2021, Samsung Galaxy S23/S20/S10, and iPhone 17/16/15 Pro. Plug and play
- Please Note: To reach 10Gbps speed, keep the cable under 3.3 ft. For USB A Male to USB C adapters, try flipping the USB C connector. USB C Male to USB A adapters support bidirectional 10Gbps transfer within 3.3 ft
2. Cover skin during peak mosquito hours
Wear long sleeves, long pants and socks when practical, particularly from dusk through evening and again around dawn. Loose, tightly woven clothing leaves fewer areas for a mosquito to reach. Clothing is an additional barrier, not a substitute for repellent on exposed skin.
3. Keep mosquitoes outside
Inspect every window, door and other screened opening. Screens should fit tightly and have no holes or tears. Repair damaged mesh or replace it when a patch cannot restore a close fit. Check doors that are frequently propped open, garage-to-house doors and vents that connect indoor and outdoor spaces.
4. Remove standing water at least weekly
Female mosquitoes can use small amounts of stagnant water to lay eggs. Los Angeles County Environmental Health advises tipping out or draining containers at least once a week and again after rain. Walk the property and empty buckets, plant saucers, toys, tarps, trash containers, clogged gutters, wheelbarrows and any other item that can hold water. Scrub or rinse containers when appropriate, because eggs can cling to damp surfaces even after water is poured out. Store items under cover or turn them upside down so they cannot refill.
Best Value
- 5-in-1 Connectivity: Equipped with a 4K HDMI port, a 5 Gbps USB-C data port, two 5 Gbps USB-A ports, and a USB C 100W PD-IN port. Note: The USB C 100W PD-IN port supports only charging and does not support data transfer devices such as headphones or speakers.
- Powerful Pass-Through Charging: Supports up to 85W pass-through charging so you can power up your laptop while you use the hub. Note: Pass-through charging requires a charger (not included). Note: To achieve full power for iPad, we recommend using a 45W wall charger.
- Transfer Files in Seconds: Move files to and from your laptop at speeds of up to 5 Gbps via the USB-C and USB-A data ports. Note: The USB C 5Gbps Data port does not support video output.
- HD Display: Connect to the HDMI port to stream or mirror content to an external monitor in resolutions of up to 4K@30Hz. Note: The USB-C ports do not support video output.
- What You Get: Anker 332 USB-C Hub (5-in-1), welcome guide, our worry-free 18-month warranty, and friendly customer service.
5. Deal with pools and persistent infestations
Keep swimming pools and ornamental water features maintained so they do not become breeding sites. For a neglected pool, a large infestation or a problem on neighboring property, contact the appropriate local vector-control district or Los Angeles County Environmental Health. The county provides district contacts for questions and infestations; its 2026 guidance directs residents to the county’s Environmental Health pool reporting channel or the local district, depending on the location and property type.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.A practical Los Angeles home routine
- Choose a weekly inspection day. After rainfall, repeat the inspection rather than waiting for the next scheduled day.
- Start at the front entry. Confirm that doors close fully and that screens and weather seals have no openings.
- Circle the yard and balcony. Empty or cover every container that can hold water, including items hidden behind furniture or plants.
- Check drainage. Clear blocked gutters, drains and low spots where water remains after irrigation or rain.
- Inspect screens from indoors. Look toward daylight for pinholes and tears; repair or replace damaged mesh promptly.
- Plan dawn and dusk activities. Apply labeled repellent before going outside and wear covering clothing when feasible.
- Escalate unresolved problems. Photograph a persistent breeding site if useful and ask the local vector-control district or county Environmental Health which reporting channel applies.
What to do after a mosquito bite
A bite alone does not show that the mosquito carried WNV. Monitor for illness during the following days and contact a healthcare provider if fever, headache, body aches or other concerning symptoms develop, especially if you are in a higher-risk group. Seek urgent care for confusion, severe headache, stiff neck, weakness, seizures, difficulty speaking or other signs of nervous-system involvement.
Tell the clinician about recent outdoor exposure and the timing of symptoms, but do not delay care while trying to identify the mosquito or obtain a test. There is no home method that can determine whether a particular bite transmitted WNV.
The Tool Desk
Outbyte Driver Updater FREEFix the driver behind crashes, sound loss and screen glitchesFind Drivers →Outbyte PC Repair FREERepair Windows errors before they cause bigger problemsFix Now →Why prevention still matters when most infections are silent
Asymptomatic infections can make local transmission invisible to the person bitten. A mosquito population can acquire virus from birds and expose multiple people before anyone recognizes a pattern. Removing breeding water protects your household and reduces mosquitoes that could spread virus to neighbors. Repellent, clothing and screens reduce the chance of a bite while source control addresses the mosquitoes around the property.
Los Angeles County Health Officer Muntu Davis, MD, MPH, summarized the county’s response after the first 2026 human cases: “The first human cases of West Nile virus are an important reminder that we all need to take steps to prevent mosquito bites and mosquito breeding.” That advice applies whether or not a resident has seen a dead bird, received a case notice or noticed mosquitoes nearby, because those observations do not reliably measure the risk at an individual home.
Quick Recap
Questions to ask when choosing protection
- Is the repellent EPA-registered? Check the registration and active ingredient on the package rather than relying on a marketing claim.
- Does the label fit the user? Follow directions for children, pregnancy, sensitive skin, reapplication and use with sunscreen.
- Will the barrier work at this property? A screen repair or replacement must fit the existing frame and close the actual opening.
- Has standing water been removed? Recheck after irrigation and rain, including containers that are easy to overlook.
- Is professional help needed? Contact vector control or Environmental Health for neglected pools, recurring infestations or questions about the correct reporting channel.
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
