The Best Way to Fight the Flu

The video explains the concept of flu season, which occurs twice a year due to the opposite winters in the Northern and Southern Hemispheres. It discusses how the flu virus spreads more easily in cold, dry conditions and why a new vaccine is needed each year due to the virus's rapid mutation. The video also covers the process of selecting flu strains for vaccines, which involves global data collection and predictions by the World Health Organization. Despite efforts, vaccines may not always match circulating strains due to changes during production.

Why do flu seasons occur at different times in the Northern and Southern Hemispheres?

• Because healthcare systems are different in each hemisphere.

• Because the flu virus mutates differently in each hemisphere.

• Due to the varying levels of humidity in each hemisphere.

• Due to the opposite timing of winter months in each hemisphere.

What environmental conditions are ideal for the transmission of the influenza virus?

• Low temperature and low humidity

• High temperature and low humidity

• Low temperature and high humidity

• High temperature and high humidity

Why is a new flu vaccine needed every year?

• Because the flu virus mutates frequently.

• Because the old vaccines expire.

• Due to changes in healthcare policies.

• Because people develop immunity to the old vaccine.

What are the proteins called that help the influenza virus attach to host cells?

• Hemagglutinin and Neuraminidase

• Antigen and Antibody

• Hemoglobin and Neuron

• Protein A and Protein B

How are the flu strains for the vaccine selected each year?

• By random selection from all known strains.

• Using data collected by health organizations worldwide.

• By selecting strains that are easiest to vaccinate against.

• Based on the most common strains from the previous year.