This article, presents data that shows that people with blood group A are more represented in a COVID-19 infected cohort than in controls (57% vs 38%) , while people with group O are less represented (24.8% vs 37.2%).
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Göker, Hakan, Elifcan Aladag-Karakulak, Haluk Demiroglu, et al . “ The effects of blood group types on the risk of COVID-19 infection and its clinical outcome ." Turkish Journal of Medical Sciences 50, no. 4 (2020): 679-683. https://doi.org/10.1016/j.jece.2020.104306