Question

1. why does a person suffered once from small pox cannot suffer with it again? 2. writethe meaning of terms organo-specific and tissue specific manifestation? plzzzz answer these questions till evening......

Answer 1

Its because our memory cells are able to identify the disease and attack it accordingly using wbc

Answer 2

there is vaccine for that protozoa iin our body. if that protozoa again come means the vaccine will kills that protozoa due to that it won't come again