Yes, according to several restrospective study on relationship between Blood groups and COVID-19 infection-

i) Individuals with blood type O have shown lowest risk of infection of COVID-19;

ii) People with blood groups A or AB appear to exhibit greater COVID-19 disease severity than people with blood groups O or B.

You will find the findings of these retrospective studies in the following links-

https://pubmed.ncbi.nlm.nih.gov/33057631/

https://pubmed.ncbi.nlm.nih.gov/33057633/

Thank you Fahmida Begun Mina,

I should know my blood group, so as to know of mine!

Getu Habte

Yes, people with blood type A have a 45% increased risk of contracting the SARS-CoV-2 and developing respiratory failure compared to people with other blood types. On the other hand, people with blood type O have a 35% lower risk of developing severe COVID-19 illness.

https://www.news-medical.net/news/20200618/Blood-types-and-COVID-19-risk-confirmed.aspx

Thanks!

Please also see the RG link below.

Article Relationship between blood group and risk of infection and d...

Dear Getu Habte thank you for this very important technical question. In addition to the valuable references already provided by Arvind Singh and Fahmida Begum Mina please also have a look at the following very recent links about this topic:

1. ABO blood group and COVID-19: a review on behalf of the ISBT COVID-19 working group

Article ABO blood group and COVID‐19: a review on behalf of the ISBT...

This article is freely available as public full text on ResearchGate.

2. People with blood type O may have a lower risk of COVID-19: Study     

https://www.nationalheraldindia.com/international/people-with-blood-type-o-may-have-a-lower-risk-of-covid-19-study

3. Blood type A may raise COVID-19 contraction risk: Study

https://www.aa.com.tr/en/health/blood-type-a-may-raise-covid-19-contraction-risk-study/2164478

The problem here is that many people don't know what their blood group is...😎

Yes. An increasing number of studies reported the association between blood groups and covid-19 infection. People with blood group O tend to show more resistance to covid-19 infection compared to others ; where as people with blood group A have been reported to be more susceptible of getting covid-19 infection than others.

Getu Habte

Also, take a look at this link.

https://www.nature.com/articles/s41467-020-19623-x

Thanks!

Dear Getu Habte , have a look on these articles:

https://www.medpagetoday.com/infectiousdisease/covid19/89117

https://www.medrxiv.org/content/10.1101/2020.03.11.20031096v2

https://www.healio.com/news/hematology-oncology/20210108/studies-contradict-earlier-findings-on-blood-group-and-covid19-severity-mortality

Yes, I endorse the answers Prof. Dr. Frank T. Edelmann and Dr. Arvind Singh

People with blood group "A" have a higher risk whereas people with blood group "O" have a lower risk for SARS-CoV-2 infection.

https://academic.oup.com/cid/article/73/2/328/5880600

The following study conclude that incidence, severity, and mortality of COVID-19 are common in non-blood group O, while blood group O is protected against COVID-19.

Article ABO groups can play a role in susceptibility and severity of COVID-19

The following study from India suggest that blood groups A, B, and Rh+ are more susceptible to SARS-CoV-2 infection, whereas blood groups O, AB, and Rh− are at a lower risk of SARS-CoV-2 infection.

Article Association of ABO and Rh Blood Group in Susceptibility, Sev...

Although the association between blood groups and outcomes of COVID-19 is not consistent, it is speculated that non-O blood group carriers with COVID-19 are at higher risk of developing severe outcomes in comparison to "O" blood group.

Article The relationship between blood groups and risk of infection ...

The following study conclude that blood group "A" is associated with an increased susceptibility to SARS-CoV-2 infection than other blood groups. Cases of this blood group are also associated with more critical care needs and a higher viral load on testing.

Article ABO blood grouping and COVID-19: a hospital-based study in E...

The following study from Saudi Arabia suggest that blood group "B" is a risk for COVID-19 while blood group "O" is protective for COVID-19 infection.

Article Correlation between ABO Blood Group Phenotype and the Risk o...

Also have a look at this:

Article The SARS-CoV-2 receptor-binding domain preferentially recogn...

The full-text of the above article is available online.

Contrary to above, the following study suggest that blood group type is not associated with disease susceptibility or severity, including viral positivity, hospitalization, or ICU admission.

Article Association of Sociodemographic Factors and Blood Group Type...