Other Languages: Español | 繁體中文 | 简体中文
Go to: Vaccination | Symptoms | Transmission | Treatment | Prevention | Risk Groups
Flu (influenza) is a contagious respiratory illness that causes symptoms such as fever, cough, sore throat and body aches. It is most common during the fall and winter months. Every year, about 2,000 New Yorkers die of seasonal flu and pneumonia, which can develop as a complication of the flu.
Annual vaccination is the best way to protect against the flu. You can receive the flu vaccine at the same time as other vaccines, including the COVID-19 and RSV vaccines.
You can get your vaccine at a community vaccination event this month:
Flu vaccines are safe and the best way to protect yourself against getting sick. Getting a flu vaccine reduces your risk of getting the flu and reduces your risk of severe illness, hospitalization and death if you do get it.
The CDC recommends that most people get the flu vaccine in September or October. People can continue to be vaccinated as long as the flu is circulating in the community, even in January or later.
Everyone ages 6 months and older should get a flu vaccine every year, even if they have received a flu vaccine or had the flu in prior seasons.
It is especially important to get vaccinated if:
See High-Risk Groups for more information.
Children in school or day care may be required to get a flu vaccine in NYC.
Nearly everyone should get a flu vaccine. However, if you are currently sick, have a history of Guillain-Barré syndrome or have a history of an severe allergic reaction to the flu vaccine or any ingredient in it, talk to your provider before getting a vaccine.
Flu vaccines are widely available at doctor’s offices, pharmacies, community health clinics and through employer-sponsored programs. Most health insurance plans cover flu vaccination without a co-pay or other fees.
New Yorkers with no or limited health insurance can get low- to no cost vaccines, including at NYC H+H sites. Find a flu vaccine on the NYC Vaccine Finder.
The flu vaccine is usually given by an injection (shot), but there is also a nasal spray flu vaccine. There are many flu vaccine options. Different vaccines are approved for use in people in different age groups. In addition to the standard dose, there are three flu vaccines recommended for people 65 years and older. If you have questions about which vaccine is best for you, talk to your doctor.
The flu vaccines are very safe. Side effects are usually mild and may include soreness, redness, and swelling where the shot was given, headache, fever, nausea, muscle aches and fatigue.
Flu vaccines are made using killed flu viruses (for inactivated vaccines), or without flu virus at all (for recombinant vaccines). You cannot get the flu from a flu vaccine.
Go to: Vaccination | Symptoms | Transmission | Treatment | Prevention | Risk Groups
Flu symptoms usually start to show one to four days after being exposed to the virus. Most people are sick for a few days.
Typical symptoms include fever, fatigue, chills, headache, body aches, cough, runny or stuffy nose, and sore throat. Intestinal symptoms, such as vomiting or diarrhea, are possible but less common.
Flu sometimes leads to serious complications, such as pneumonia, hospitalization or death.
Flu symptoms can be similar to symptoms of other respiratory viruses, such as COVID-19.
If you have symptoms, get tested for flu and COVID-19 right away so you can start treatment if eligible. Many doctors’ offices, clinics, urgent care centers and pharmacies offer testing for COVID-19, flu and other respiratory viruses in one test.
Go to: Vaccination | Symptoms | Transmission | Treatment | Prevention | Risk Groups
Flu is very contagious and easily spreads through contact with someone who is sick. The virus spreads mainly by droplets produced when someone who is sick coughs, sneezes or talks. People can become sick if these droplets or infected mucus or saliva enter their eyes, nose or mouth.
People can spread the virus up to a day before they have symptoms and when they are sick. Usually, people are more contagious in the first three days of illness.
If you have symptoms of flu or test positive for the virus, you should stay home and take steps to avoid spreading the virus to others. See Prevention for more information.
Go to: Vaccination | Symptoms | Transmission | Treatment | Prevention | Risk Groups
Most people recover from the flu on their own, but treatment with antiviral medicine is available for people at increased risk of severe illness and complications from flu. If you have flu, contact your provider right away to see if you should get treatment, as treatment works better the sooner it begins.
Everyone who has flu should rest and drink plenty of liquids. You can consider over-the-counter medications that you normally take to reduce symptoms such as fever. People 18 and younger should not take aspirin or aspirin-containing products, such as Alka Seltzer® or Pepto-Bismol. Aspirin can cause a rare but serious illness called Reye’s syndrome in young people with flu. Talk to your provider if you have questions about what medicines to take.
You should call a health care provider if you experience emergency symptoms such as shortness of breath, chest pain or severe weakness or muscle pain. If your child is sick, call their provider if they have any of the following:
If you are unable to reach a provider, go to an urgent care center or an emergency room.
For adults or children with difficulty breathing (in young children, this may appear as rapid breathing, grunting, nostrils flaring or using neck muscles to breathe), a pale or blue color around the lips or mouth, confusion, severe dehydration, or other concerning symptoms, call 911 or go to a nearby hospital.
Go to: Vaccination | Symptoms | Transmission | Treatment | Prevention | Risk Groups
In addition to getting vaccinated, follow these tips to help avoid getting and spreading flu:
If you feel sick, or test positive for flu, stay home until, for at least 24 hours, your symptoms are improving and you have not had a fever without using fever-reducing medicines. You can then resume usual activities like work and school, but wear a well-fitting mask for the next five days as you still may be contagious.
Go to: Vaccination | Symptoms | Transmission | Treatment | Prevention | Risk Groups
Anyone can get very sick from the flu and have serious complications. However, the following groups are more likely to have severe illness, be hospitalized, or even die from the flu:
For more information, visit CDC: People at Higher Risk of Flu Complications