Antibodies are proteins that bind to each other. Each antibody has two heavy chains and two light chains, which are polypeptides (peptides made up of two or more amino acids). Each antibody molecule is made up of two heavy chains and two light chains that come together to create a Y-shaped molecule. The points of the "Y" on each type of antibody have a distinct amino acid sequence, which explains why each antibody is formed uniquely.
Antibodies against the COVID-19 virus can be identified in the blood of patients who have recovered from illness or who have received the COVID-19 vaccination. If you've already had COVID-19, having the vaccination boosts your immune system's reaction and enhances your viral protection.
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