A new study has found that Americans who received one dose of the Johnson & Johnson vaccine are 3.5 times more likely to develop blood clots.

Mayo Clinic researchers compared data from the general population before the start of the coronavirus pandemic to data gathered from reported vaccine side-effects among Americans. Daily Mail reported that these researchers came to the chilling conclusion that a person who received the vaccine was 3.5 times as likely to develop brain blood clots than an average person before COVID-19.


The researchers published their findings in JAMA Internal Medicine this week after studying data from Olmstead, County, Minnesota, a county of around 158,000 people 90 miles southeast of Minneapolis, from 2001 to 2015. They compared this data to numbers from the Centers for Disease Control and Prevention’s Vaccine Adverse Event Reporting System (VAERS) over the past year.

Between 2001 and 2015, 39 residents of Olmstead developed CVST, which is a rare, potentially deadly, blood clotting condition that can form in a person’s brain. 29 of these people had a risk factor for developing this blood clot within 92 days of them getting it.

During this fourteen-year time period, when adjusted for population, there were 2.46 cases of CVST out of every 100,000 person-years of the residents of Olmstead County.

The Mayo Clinic researchers then found that there were 46 reports of CVST to VAERS after receiving the J&J vaccine, with eight being removed from this pool because they were either duplicate reports or not being professionally diagnosed. The researchers found that 38 cases in total were tied to the J&J vaccine were detected, with over 70 percent being among women.

They concluded that when adjusted for population, there were 8.65 cases out of every 100,000 person-years among people who received the J&J vaccine. That’s an astounding rate of 3.5 times higher than the general population.

In another disturbing twist, the researchers found that vaccine recipients are at most risk of developing the condition within the first 15 days after they get the shot. The highest risk group for developing this condition are women between the ages of 30 and 65.

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J&J is seen as the least popular of the three vaccine options that are available in the United States. Nevertheless, it still draws in many people because it is only one shot, while the other two vaccines involve being jabbed twice. CDC records show that as of Monday morning, 15.6 million doses of the jab have been administered to the public.

It’s crucial that people know the risks that come with this vaccine when it comes time for them to decide whether or not to get the shot.