Because the flu virus is constantly changing, the annual vaccine must also constantly change. What does the CDC do to help them decide how the flu vaccine should be formulated each year?

Question

They use a computer program to guess how the flu might have changed from the previous year.

They help medical professionals prepare to take care of all the people who will get sick from the flu each year.

They collect virus samples from sick people all over the country and analyze them.

They count the number of people that get sick from the flu each year.

Answer 1

The correct answer is: They collect virus samples from sick people all over the country and analyze them.

The CDC and other health organizations monitor the circulation of flu viruses through surveillance systems, collecting samples from various locations to track how the virus is changing and to make informed decisions about the composition of the flu vaccine each year.