Immunity induced by Covid infection and vaccination. What is the difference?
Dr Thomas Nedumpara FRCS
Surgical Oncologist
North Cumbria University hospitals Cumbria,UK.
Immunity is induced differently by natural infection and vaccination. Immunity broadly is of two types cell mediated immunity by T lymphocytes and specific antibodies against viral proteins mediated by B lymphocytes. It is easy to measure antibody levels and when present in the blood we call the person seropositive. Cell mediated immunity by killer T cells is more difficult to measure but play a crucial role in destroying the infected cells and T cells also stimulate B cells to produce antibodies. Since SARS2 virus causing Covid 19 infection is new we don’t have enough data about how long the immunity...
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