What does blood type have to do with infection risk?

People with the blood type O could be more susceptible to streptococcal infections than those with other blood types, Australian researchers say.

Studies on Group A Streptococcus (GAS) shows that the sugar molecules on type O blood may create a ‘bridge’ for colonisation, say infectious disease scientists at the Illawarra Health and Medical Research Institute.

Their work on the M1T1 GAS, present in many cases of pharyngitis and invasive infections, shows the bacteria may have a preference for the glycans found on type O blood cells.

 “We know that some people are more susceptible