I’ve read covid is more of a concern for people with A, B and AB
“Among the COVID-19 positive, they found fewer people with blood type O and more people with A, B, and AB types. The study results suggest that people with blood types A, B, or AB may be more likely to be infected with COVID-19 than people with type O.”
https://www.hematology.org/newsroom/press-releases/2020/possible-link-between-blood-type-and-covid-19
So sorry to hear about your liver cancer diagnosis