Saturday, 31 October, 2020

Blood type O least vulnerable to Covid; A, AB at most risk

It also recorded 2,673 new confirmed cases which brings the total number of Covid-19 cases in the country to 354,338 It also recorded 2,673 new confirmed cases which brings the total number of Covid-19 cases in the country to 354,338
Gustavo Carr | 17 October, 2020, 17:01

As COVID-19 cases continue to rise in the United Kingdom, more people will suffer "debilitating" long-term after-effects of a related infection, academics have warned.

They said that it can not be assumed that people who are at lower risk of severe illness and death from COVID-19 are also at low risk of ongoing COVID.

When researchers parsed through data from the Danish health registry of more than 473,000 people tested for COVID-19 and compared it to a control group of over 2.2. million people from the general populace, they found that among COVID-positive patients, there were fewer with blood type O and more with blood types A, B and AB. For example, people with type A blood produce different antibodies to people with blood type O. It's still not known, however, whether this has any significant effect on a person's ability to battle Covid-19. They found that patients with blood groups A or AB were more likely to need mechanical ventilation, with 84 percent of A or AB patients requiring mechanical ventilation compared to 61 percent of O or B patients. It could be, for example, that a certain ethnic group is at a higher risk of catching Covid-19 and they incidentally are likely to share a certain blood type.

In the second study, scientists examined 95 critically ill coronavirus patients in a hospital in Vancouver. While those answers seem to vary month to month, a pair of studies find your blood type may play a key role in how badly COVID-19 affects you. Earlier in March, a study of over 2,100 coronavirus patients in Wuhan and Shenzhen (also not peer-reviewed) found that people with Type O blood had a lower risk of infection.

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Since blood group distributions vary among ethnic subgroups, the researchers also controlled for ethnicity and maintained that fewer people with blood type O tested positive for the virus. People with O-blood are also capable of donating red blood cells to any other type.

Lead author of the study, Dr Mypinder Sekhon, of the University of British Columbia, said: "The unique part of our study is our focus on the severity effect of blood type on COVID-19".

Patients with blood types A and AB did not have longer hospital stays than those with types O or B, but they did experience longer intensive care unit stays, which may signal greater COVID-19 severity.

"Individuals with O blood type are between 9-18% percent less likely than individuals with other blood types to have tested positive for COVID-19, according to the data", a company statement said at the time. This means that it's not clear how the relationship between blood type and Covid-19 works and any link may be coincidental.