The Food and Drug Administration (FDA) added heart inflammation warnings to information about the Pfizer and Moderna Covid-19 injections.
The warning was added after thousands of vaccinated young adults and children around the world were diagnosed with myocarditis (inflammation of the heart muscle) and pericarditis (inflammation of the membrane lining the heart).
Both heart conditions can be fatal and require immediate medical attention. Heart inflammation was diagnosed in people under age 30, including at least 1,200 young adults and children in America.
The Pfizer and Moderna shots use mRNA spike protein technology and require two injections, while the Johnson & Johnson shot uses an adenovirus and requires a single dose.
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In related news, the World Health Organization (WHO) is recommending face masks for everyone – vaccinated and unvaccinated – due to the spread of the so-called Covid “delta” variant.
“Vaccine alone won’t stop community transmission,” the WHO’s Dr. Mariangela Simao said.
“People need to continue to use masks consistently, be in ventilated spaces, hand hygiene … the physical distance, avoid crowding. This still continues to be extremely important, even if you’re vaccinated when you have a community transmission ongoing.”
Most Americans stopped wearing face masks and face coverings in May, after the Centers for Disease Control issued new guidelines for people who are fully vaccinated.