“A pre-print study which claimed that there is a 1 in 1,000 risk of contracting a heart inflammation condition known as myocarditis has since been retracted due to a calculation,” Reuters reports. “The study which was conducted by researchers at The University of Ottawa Heart Institute, was featured in numerous [MAGA and antivax] blogs and social media posts as proof that the COVID-19 vaccine is unsafe for use.”

“The study was first published on September 16 on the platform MedRxiv, a website that publishes studies that have yet to be peer-reviewed. The pre-print paper has since been retracted. The study had calculated an incidence rate of myocarditis in the Ottawa region post-vaccination by dividing the number of occurrences of the heart inflammation condition over a two-month period (June and July 2021) in Ottawa (32) by the total number of vaccinations in the area (reported as 32,379 in the pre-print).”

“The incidence rate of myocarditis, using these figures, equates to 10 for every 10,000 doses of the vaccine. The pre-print paper had used an incorrect figure for the number of doses administered in Ottawa over that two-month period, however. Between the week beginning May 30 and the week starting July 25, there had been 845,930 vaccines administered in the Ottawa region, according to data published by Ottawa Public Health, which is far greater than the figure used to calculate the incidence rate.”

“The denominator (total vaccines administered over a two-month period in Ottawa) used to calculate the incidence rate of myocarditis in the pre-print study was approximately 25 times smaller than the correct figure. The study was then withdrawn on September 24.”

The normal rate of myocarditis is around 10 to 20 cases per 100,000 people per year, which suggests the Covid19 vaccine had no statistically significant impact on myocarditis rates.