When a virus such as Covid 19 enters our body, it attacks and multiplies which then causes an infection which leads to illness.
Blood that contains red cells (red blood cells carry oxygen to tissues and organs), and white/ immune cells (fight infections), are used by our immune system to fight infection. The different types of White blood cells, Macrophages ( swallow and digest germs and dead/dying cells and leave part of invading germs behind which are called antigens- which are dangerous, which alerts the body to produce antibodies to fight them), B-lymphocytes (produce antibodies to attack parts of the virus left behind by macrophages), and T-lymphocytes (attack infected cells in the body), fight infections in different ways.
It can take days/ weeks for the body to fight infection when a person is first infected with Covid 19. T-lymphocytes also called memory cells act very quickly should the body get the same virus again. It produces antibodies to fight the familiar antigens. It is not yet known how long these cells protect a person against the virus that causes COVID19.
Vaccines provide a supply of T-lymphocytes and B-lymphocytes that remembers how to fight the virus. These cells are produced a few weeks after taking the vaccination. That is why it is still possible to get infected just before or just after taking the vaccination as the vaccine didn't have enough time to produce antibodies. Symptoms such as fever is normal after receiving the vaccine while the body undergoes the process of building immunity.
There are currently two dose and one single dose vaccines available in South Africa. You are considered fully vaccinated two weeks after your second dose or two weeks after your single dose depending on which vaccine you get.
Content created and supplied by: Gkmedia (via Opera News )