If the reason that someone so far has been hesitating to get the vaccine is fear of this very rare and usually not very serious adverse event called myocarditis, well, this study shows that that very same adverse event is actually associated with a higher risk if you’re not vaccinated and you get infected. — Ben Reis. Director of the Predictive Medicine Group at Harvard Medical School and the Boston Children's Hospital Computational Health Informatics Program
If the reason that someone so far has been hesitating to get the vaccine is fear of this very rare and usually not very serious adverse event called myocarditis, well, this study shows that that very same adverse event is actually associated with a higher risk if you’re not vaccinated and you get infected. — Ben Reis. Director of the Predictive Medicine Group at Harvard Medical School and the Boston Children's Hospital Computational Health Informatics Program
Myocarditis More Common After Covid Vaccination, Study Finds
The Pfizer-BioNTech Covid-19 vaccine is associated with an increased risk of myocarditis, an inflammation of the heart muscle, a large new study from Israel confirms. But the side effect remains rare, and Covid-19 is more likely to cause myocarditis than the vaccine is, scientists reported on Wednesday.

The research, which is based on the electronic health records of about two million people who are 16 or older, provides a comprehensive look at the real-wold incidence of various adverse events after both vaccination and infection with the coronavirus.


Although the study did not break down the myocarditis risks by age or by sex, the median age of people who developed the condition after vaccination was 25, and 19 of the 21 cases were in males, the researchers reported.

In addition to myocarditis, the Pfizer vaccine was also associated with an increased risk of swollen lymph nodes, appendicitis and shingles, although all three side effects remained uncommon in the study. Coronavirus infection was not associated with these side effects, but it did increase the odds of several potentially serious cardiovascular problems, including heart attacks and blood clots.

“Coronavirus is very dangerous, and it’s very dangerous to the human body in many ways,” said Ben Reis, a co-author of the new study and the director of the predictive medicine group at the Boston Children’s Hospital Computational Health Informatics Program.

He added, “If the reason that someone so far has been hesitating to get the vaccine is fear of this very rare and usually not very serious adverse event called myocarditis, well, this study shows that that very same adverse event is actually associated with a higher risk if you’re not vaccinated and you get infected.”


... In addition to myocarditis, coronavirus infection was also associated with an increased risk of heart attacks, irregular heart beat, blood clots in the lungs or legs, kidney injury and bleeding inside the skull. For every 100,000 infections, there were an extra 25 heart attacks and 62 cases of blood clots in the lungs, for instance.

“When you try to make your decision on whether or not you should take the vaccine, one of the things to ask is not only what are the potential adverse events associated with taking the vaccine, but also what am I risking when I think about Covid-19 as the other option,” Dr. Balicer said.
Read the full article: https://www.nytimes.com/2021/08/25/health/covid-myocarditis-vaccine.html