After three years of the pandemic, several questions about the vaccine′s side effects, including heart attacks, remain unanswered. However, several clinical trials and studies published in top journals have shown that the incidence of myopericarditis (acute heart inflammation) and myocarditis is higher in males after the second dose.

For instance, a meta-analysis of 23 studies that included 854 patients diagnosed with mRNA vaccine-associated myopericarditis (rare acute heart inflammation) revealed that the incidence of myopericarditis was higher in males after the second dose. The study also revealed that after the second dose, the risk of blood clots increased by 27.6 times, followed by a 21.6-fold increase in cases of heart failure, a 17.5-fold rise in cases of stroke, and a 10-fold rise in cases of arrhythmia, or irregular heartbeat, among people who were hospitalized due to COVID-19.

Another study published in the Journal of the American College of Cardiology found that the incidence of myocarditis, pericarditis or myopericarditis is two- to threefold higher after a second dose of the Moderna Spikevax Covid-19 vaccine in comparison to the Pfizer BioNTech Covid-19 vaccine.

On the other side, the latest analysis published in the journal Frontiers in Medicine showed that the vaccinated population that has recovered from a COVID-19 infection has a 50% lower chance of becoming infected a second time or contracting COVID-19 again with severe symptoms compared to those who are not vaccinated. 

(Source: https://www.daijiworld.com/news/newsDisplay?newsID=1028372)