How did the influenza epidemic speard?

Influenza spreads primarily through respiratory droplets. Infectious virus-containing droplets are produced when someone with the flu coughs, sneezes, or talks. These droplets can be inhaled by others who are nearby, or they can land on surfaces where the virus can survive for several hours. People can also become infected by touching surfaces contaminated with the virus and then touching their eyes, nose, or mouth.

The influenza virus can spread easily and rapidly. It is estimated that up to 20% of the US population gets the flu each year. The virus can spread from one person to another within close contact (within 6 feet). The flu can also spread through indirect contact, such as touching surfaces or objects that have been contaminated with the virus.

The influenza virus is most contagious during the first 3-4 days of illness. However, people can be contagious for up to 7 days after they develop symptoms.

The influenza virus is more likely to spread in certain settings. These settings include schools, childcare centers, nursing homes, and hospitals. The flu virus can also spread in crowded places, such as public transportation, shopping malls, and sporting events.

There are several ways to prevent the spread of influenza. These include:

* Getting vaccinated against the flu

* Staying home when you are sick

* Covering your cough or sneeze with a tissue

* Washing your hands frequently

* Avoiding touching your face

* Cleaning and disinfecting surfaces that are frequently touched

By taking these steps, you can help to reduce the risk of spreading the influenza virus to others.