So its acquired immunity and the cells responsible are the B lymphocytes that produces antibodies against the virus. Memory is keep since first encounter of the virus by the immune system by way of the antibodies that was initially produced. The antibodies are there already, which makes it fast to act upon when expose again.
Eating well, exercise, sleep, drinking water, avoiding harmful habits , don’t get sick constantly
You are more likely to gain weight if you consistently eat a:
b. larger-than-normal meals
