Raise Your Flu IQ
Your Flu Questions Answered
WebMD News Archive
Question: How soon after coming in contact with the flu virus are you contagious?
According to the CDC, a person begins shedding virus a day before symptoms appear. This can occur as soon as one day after exposure.
Question: How do you know when you're contagious?
When you get symptoms, the virus has multiplied in your body to the point you can give the flu to someone else. But you aren't likely to spread the infection -- except maybe to close household contacts -- until you start coughing or sneezing.
Question: How long does the virus live on the phone, desk, etc?
Dr. Clements: Maybe an hour. It depends on the moisture in the air and the temperature of the room.
Question: Can you kill the virus with disinfectants?
Dr. Clements: Yes. Alcohol or anything that kills other germs would work.
Question: If you come in contact with someone that has the flu, is it 100% certain that you'll get the flu?
Dr. Clements: No. Not necessarily, but droplets that land on your face are very contagious. If a person has the flu, they should at least turn away from others when they cough or sneeze. If you find yourself on an elevator with someone who is coughing or sneezing, the best thing you can do is turn away.
Question: Can you get the flu from the flu vaccine? What symptoms can you get from the flu vaccine?
Dr. Clements: No. The flu shot is just killed virus. The FluMist spray vaccine is a live, weakened form and when you get it you may have some mild symptoms as if you were starting to get flu. You might even briefly have a runny nose, but you won't get the flu.
Note: Some people may, by coincidence, get a cold or other respiratory infection soon after vaccination. This is not flu caused by the vaccine. According to the CDC, the most common flu vaccine side effect is a sore arm where you got your flu shot. Children and others who have never before had the vaccine may have some fever, muscle aches, or other flu-like symptoms after vaccination. These symptoms can begin as soon as six to 12 hours after vaccination and last for one or two days.
The CDC says that the influenza vaccine does not affect the safety of breastfeeding mothers or their infants.
The flu vaccine is made in eggs. People allergic to eggs should not take the vaccine. Allergic reactions to the vaccine rarely occur, and are thought to be caused by egg protein remaining in the purified vaccine. Three reactions can include hives, skin redness, asthma, and/or shock.