Evolution of the Influenza Virus Quick Check
Marl
4 of 5
Why is there such a wide variety of immune system responses between hosts when they are infected with the same virus? (1 point)
• Each person's immune system employs different tactics to get rid of the virus.
• Slight variations due to mutations in the virus trigger different responses in people.
Some viruses are resistant to antibiotics, so they cause a stronger immune system response.
• People that have already been infected are asymptomatic.