Please keep in mind that the study has yet to be peer-reviewed.
Infection
Lowest risk for blood type O.
Higher risk for A, B and AB.
Intubation
Low risk: Blood type A.
High risk: Blood types B and AB
Death
Low risk: Blood types A and B
High risk: Blood type AB
For all 3, infection, intubation and death, Rh negative blood type is estimated to have a protective effect.
The study: