Pfizer mRNA shots Switch Antibodies to Non-Neutralizing IgG4

A new peer-reviewed research showed that the Pfizer mRNA COVID shot could switch neutralizing antibodies to a non-inflammatory type, IgG4. The study may explain why vaccinated individuals have breakthrough infections and why Long COVID syndrome happens. Let’s start with a brief background that is relevant to the study Immunoglobulins Antibodies are also known as immunoglobulins….