What Is The Difference Between The Two Kinds Of Antibodies?
IgM Antibodies: IgM antibodies are the initial response of the body to any infection and they develop in an early phase of the infection. Typically, in the case of COVID-19, IgM will start getting positive after the first week of contracting the virus and disappear after six weeks. "IgM tells us that an individual has been exposed and he/she is either entering early immune phase or established immune phase", said Dr Ravindra Mehta, Chief of Pulmonary and Critical Care Medicine at Apollo Hospitals in Bengaluru.
IgG Antibodies: IgG antibodies are a late response to an infection and more likely to turn positive after three weeks of contracting the virus. IgG antibodies stay for a longer period of time. However, as of now, it's not clear for how long IgG gives immunity.