What is incubation period for flu?
The incubation period of influenza is 2 days long on average but may range from 1 to 4 days in length.
When should I get flu shot 2020?
There is no change in CDC’s recommendation on timing of vaccination this flu season. Getting vaccinated in July or August is too early, especially for older people, because of the likelihood of reduced protection against flu infection later in the flu season. September and October are good times to get vaccinated.
What’s in the flu shot 2020?
What’s in a flu shot?
- Egg protein. Many flu vaccines are made by growing the viruses inside fertilized chicken eggs.
- Preservatives. Vaccine manufacturers add the preservative thimerosal to multidose vaccine vials.
- Polysorbate 80.
Is February too late for flu shot?
While the flu season usually ity peaks between December and February, and it can last as late as May. Because it takes about two weeks after getting the flu shot for the vaccination to protect you against the flu, you can technically get the flu shot through February and have it still provide some benefit.
How many months is the flu season?
In the United States, flu season occurs in the fall and winter. While influenza viruses circulate year-round, most of the time flu activity peaks between December and February, but activity can last as late as May.
How does the flu start every year?
These viruses spread seasonally each year because of a phenomenon known as antigenic drift: They evolve just enough to evade human immune systems, but not enough to develop into completely new versions of the virus. The H3N2 subtype causes the most disease each year.
Where does the flu start every year?
Among their findings: seasonal flu originates in eastern and Southeast Asia. The result broadens previous hypotheses that such viruses emerged in China or exclusively in tropical regions.