Maybe.
Researchers in China have discovered some interesting evidence suggesting that persons with Type A blood have a higher risk of getting COVID-19 when compared to non-A blood type people. The researchers in China compared the blood group distribution in 2,173 patients with COVID-19 from three hospitals in China with that in normal people from the corresponding regions near those hospitals.
Their Meta-analysis on the pooled data (which has not been peer-reviewed) found that blood group A had a statistically significantly higher risk for COVID-19 (odds ratio 1.20) compared with non-A blood groups. Blood group O had a statistically significant lower risk for the disease (odds ratio 0.67) compared with non-O blood groups.
Their report concluded that “People with blood group A have a significantly higher risk for acquiring COVID-19 compared with non-A blood groups, whereas blood group O has a significantly lower risk for the infection compared with non-O blood groups.”
However, always remember to check the odds ratio on studies like this. In this case you’ll see that the odds ratio for the blood group A is 1.2 which basically means that folks with Type A blood are 20% more likely to get the illness. The odds ratio for the Group O folks suggests that they are roughly 30% less likely to be confirmed as a case. Not exactly a huge difference, but it was statistically significant.
Also, the study hasn’t been peer-reviewed which means that it hasn’t been examined for its accuracy and shouldn’t be used to guide clinical practice.