This subject matter is of great interest to me for many reason.
A big one:
Who didn’t die and why?
Having examined infections of viral origin, there were plenty of data indicating and sometimes proving resistance based on both, ABO and Rh factor.
While in some cases ABO or Rh factor might be directly related to having resistance, there is also the possibility that data can show unusual frequencies based on individuals with certain blood types being more likely to carry other genes that can make them resistant or even immune.
We are currently in the middle of the SARS-2 coronavirus pandemic where a recent study that wasn’t peer-reviewed suggested blood type O having some type of protection and blood type A being at high risk.
Is such a study credible?
First let us check if it is possible:
The answer is clearly “yes”.
Dismissing it would be foolish. Considering it possible, yet requesting more studies to confirm seems reasonable.
A researcher’s mind never rests.
A tired mind will always be behind.
People who flat-out dismiss are usually not up-to-date on research either.
Ebola has also shown interesting results.
In the case of HIV, we have seen some interesting indications, but need more global data to ensure that weak expressions of D are clearly separated from complete gene deletions in patients.
In the case of the Black Death, it has been suggested that haemochromatosis might have been responsible for an increased survival during the plague.
The populations where haemochromatosis is frequent tend to also have high percentages of Rh(D) negatives.
This is just some random information I feel appropriate at this time due to keyword searches landing here. There is much more detail on this blog and you can use the search function to find it.
Don’t assume resistance or immunity based on studies of other viruses. Don’t assume resistance or immunity to any virus regardless of study.
In some cases, it has been possible to resist viruses enough to where those infected carry a low viral load and recover fast, yet while carrying it, infecting others who wind up dying. Be responsible.