Question

Sam came home from school with a cold caused by a virus and his sister, Ana, caught it from him. Sam got well and went back to school. A few days before Ana got well, Sam came down with a cold again. Their mother said that Ana had given the cold back to Sam. How likely is it that their mother is correct, and what does it mean for Ana's chances of getting sick again?

Answer 1

If Sam only had a mild infection of the virus he might not have acquired immunity to it and could catch it again, as could Ana if she had a mild infection.

Step-by-step explanation:

Answer 2

It seems that you have missed the given options for this question, but here is the answer based on my research. How it is likely if their mother is correct and what it means for Ana's chances of getting sick again is that Sam could not get sick with the same virus again since he has acquired immunity to it, so he must have a different virus which Ana could catch. Hope this answer helps.