A public survey study on the relationship between COVID infection, ABO blood group, and post COVID symptoms.

In 2020 COVID-19 had spread rapidly to other countries, leading to declaration it a Public Health Emergency of International Concern on January 30, 2020 by World Health Organization (WHO), and later a pandemic on March 11, 2020. Over years, it has been a topic of discussion if blood type plays any role in the body’s ability to protect against COVID infection. Present survey based study was an effort to study any association between the blood group, COVID and post COVID symptoms. Study showed that the Rh positive blood type had an increased risk of COVID infection compared to Rh negative. The participants who are Rh negative and get COVID infection were also less likely very sick and showed lowest death rate compared with people who were Rh positive. While B positive and AB positive blood group complained about many health issue at post COVID period. Present study can be explored further by study at molecular level.