I just did a quick google search and ran across stories from China on susceptability and blood type. I don't have broadcast tv, and basically get my info from sources that give me numbers, WHO, CDC, Iowa Board of Health, etc. While mainstream news has a "If it bleeds it leads" need to get eyes on copy mentality, often they don't give any numbers. I know, google is what it is, and I 'm not saying it's a trustworthy source, but it was convenient. The one story I read used 2200 infected persons and "thousands of the general population". In a quick attempt to find out what percentage of the population is what type I went to the American Red Cross and added up their breakdown. For Asians, with A,B,AB blood types and their associated RH factors I got 60%. As I said I read 2 different stories and one used the word slightly greater risk for A B's the other used the word significant. If the numbers are close to being correct that 60% of the general population ( the majority) belongs to certain blood groups, seems likely there would be more cases in those groups. I also found it odd that A & B and presumably AB were grouped together, but there may be a reason for it. This is what I found and I'm not saying my numbers are correct just want to point it out.
Regarding men more likely to get it, how do those numbers related to % men vs women smokers or pack year histories , or even occupational hazards that may account for it. Latest figures from the Iowa Board of Health still has more women as verified by testing, though the gap last day or two has been closing. That easily could be explained by more women than men may seek medical attention which could lead to more women being tested for the virus.
I don't know if the information I used is accurate, but when I hear these things it does pique my curiosity .