Transplacental immunity is effective only for approximately 3 months. (Resource: p. 111, Nursing Care of Children, 3rd edition by Susan James and Jean Ashwill).
When you have immunity, your body has antibodies against a foreign organisms (i.e. bacteria and virus) .Usually this is achieved by exposure to these organisms.That is: 1. you get an infection (or...
Active Immunity - Vaccines are used for health purposes to expose our bodies to a particular antigen. These antigens are usually killed or severely weakened to decrease their potency. After...
Once you have had the flu or the vaccination, you will have lifetime immunity to the EXACT same type of flu. But since the flu virus can mutate very quickly into a new form of virus, if the one you...