People with blood type A may be more prone to Covid-19, the study of 2000 patients in China

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Is there a correlation between Coronavirus and blood group? From a research conducted on 2000 infected patients in China it would seem so and, in particular the conclusion that scientists would have arrived at and that people with blood type A would have a greater risk of being infected by Covid-19 than those of other blood groups and, in particular of group 0. A hypothesis supported by the statistics collected on a group of 2000 Chinese patients and which certainly needs further confirmation. 

Preliminary research conducted in Wuhan and Shenzhen would indicate that patients with blood type A had a higher rate of infection and tended to have more severe symptoms, while those with type 0 "had a significantly lower risk".

To verify this, medical researchers in China took blood group models from more than 2 patients infected with the virus and compared them to healthy local populations. They found that patients in blood group A showed a higher rate of infection and they tended to develop more prominent symptoms.

While the same researchers claimed that it was only one preliminary study and that further work was needed, they urged governments and medical facilities to consider differences between blood groups when planning mitigation measures or treating patients with the virus known as SARS-CoV-2.

"People of blood type A may need particularly enhanced personal protection to reduce the possibility of infection" - researchers led by Wang Xinghuan, with the Center for Evidence Based and Translational Medicine at Zhongnan, warned on South China Morning Post Wuhan University Hospital.

© MedRxiv

In contrast, "blood group 0 had a significantly lower risk for infectious disease than other blood groups," according to the scientific journal MedRxiv.

Of the 206 patients who had died from Covid-19 in Wuhan, 85 had type A blood, which was 63% more than 52 with type 0. The pattern existed in different age groups and sexes.

The study was not pre-reviewed. Gao Yingdai, a researcher at the State Key Laboratory of Experimental Hematology in Tianjin who was not involved in the study, said the research could be improved with a larger sample. Although a sample of 2 patients was not small, it is dwarfed by the total number of people infected with the coronavirus, which now exceeds 180 globally.

Another limitation of the study is that it does not provide a clear explanation for the phenomenon.

Download the full text of the study HERE.

The blood group difference has already been observed in other infectious diseases including Norwalk virus, hepatitis B and severe acute respiratory syndrome (SARS). Now, if you are Type A, you absolutely must not panic. This does not mean that you will be 100% infected!

Fonti: South China Morning Post / MedRxiv

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