Where does influenza come from?
Most influenza viruses that infect humans seem to originate in parts of Asia, where close contact between livestock and people creates a hospitable environment for mutation and transmission of viruses.
How does influenza develop in the body?
Once in your nose, the virus sets up residence, infecting the cells in your nasal passageways and airways. The virus enters a cell and replicates, making daughter viruses (aka copies of itself) that then go and infect more cells nearby. This continues until more and more of your cells are infected.
What is the 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.
What kills the flu virus in the body?
Fever—Fevers fight influenza viruses.
Because viruses are sensitive to temperature changes and cannot survive above normal body heat, your body uses fever to help destroy them.
How influenza is treated?
Usually, you’ll need nothing more than rest and plenty of fluids to treat the flu. But if you have a severe infection or are at higher risk of complications, your doctor may prescribe an antiviral drug to treat the flu.
How many flu strains are there in 2020?
There are four main strains of influenza virus: A, B, C, and D.
Why does the flu come in winter?
The virus lives longer indoors in winter, because the air is less humid than outside. While it’s alive and in the air, it’s easy for people to inhale it, or for it to land on the eyes, nose, or mouth. We spend more time indoors and have closer contact with each other, which makes it easier for the virus to spread.