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liubo4ka [24]
3 years ago
11

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 s

chool. 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?
Biology
1 answer:
tia_tia [17]3 years ago
5 0
It is very low because once you get a virus antibodies learn how to kill the viruses before your sick again 
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