Question

Why do some people get sick when exposed to a virus while others do not?

Answer 1

Because some people have a strong immune system and others do not

FOR EX:old people have weak immune system

Hope this helps

Step-by-step explanation:

Answer 2

their immune system

Step-by-step explanation:

immune system differs in individuals

so someone with a weak immune system can easily get a virus than someone who has a strong immune system