Is one of the ways in which a body resists the attack of disease and infection. The body deals with infection through the immune response. Immunity affects germs entering the body in different ways. There can be:
• Total immunity – germs are destroyed
• Partial immunity – there is not sufficient immunity to prevent the disease but there is enough to make the disease less severe
• No immunity – infection has developed and is fully evident.
There are various types of immunity which can apply to infections. They are:
• Active immunity (acquired immunity) can be obtained when the body produces its own immunity or through vaccines
• Passive immunity can be obtained through injection of a manufactured antitoxin
• Foetal immunity is obtained by the foetus when antibodies cross the placenta from the mother’s blood into the bloodstream of the foetus.