A common blood test can now hint at the full strength of an immune response

Researchers found a way to estimate the full range of antibodies fighting a disease using only a common blood test. This means scientists can now understand how robust someone's immunity is without expensive, complex lab work.

Understanding how many different types of antibodies a person has is key to knowing how well they are protected against a virus. Until now, getting this information meant complex and costly lab procedures. This paper offers a shortcut, using a simpler, more common measurement to get similar insights. It could make it easier to track population immunity or develop more effective vaccines.