Myocarditis (Enlarged Heart) and COVID Vaccines: Rare Side Effects of Pfizer & Moderna

ATLANTA — The U.S. Centers for Disease Control and Prevention has updated its advice to say males between 12 and 39 might consider waiting eight weeks between first and second doses of Pfizer and Moderna’s vaccines to reduce still-rare risk of heart inflammation.

The increase on the minimum approved interval of three and four weeks respectively comes in the wake of several studies linking those vaccines to increases in rates of pericarditis, inflammation of the outer lining of the heart, and myocarditis, inflammation of the heart muscle.

While incidence of COVID-19-associated cardiac injury or myocarditis are estimated to be 100 times higher than those related to vaccines, and the latters’ symptoms are usually far milder and resolved within weeks, a Nature Reviews Cardiology study suggests one possible mechanism behind the issue is that the immune system might detect the messenger RNA in the vaccines as an antigen, resulting in “the activation of pro-inflammatory cascades and immunological pathways in the heart.”

As so-called mRNA vaccines, both Pfizer and Moderna’s vaccines package messenger RNA, or the genetic sequence of the novel coronavirus, into a lipid nanoparticle carrier in order to program cells to reproduce the coronavirus spike protein so that it can later be recognized by the body’s immune system should it come into contact with the actual virus.

For now, though, there are several active theories about how this process could trigger heart inflammation, with the increased incidence among male patients also suggesting hormone signaling might be involved.

SOURCES: CNBC, CDC, Pfizer, Reuters

The Mayo Clinic, Johns Hopkins Medicine

[chinaexpat]

IT'S SO RARE I KNOW OF A HANDFUL OF PEOPLE WHO HAD IT

[Punaeased]

It's so rare that you hear about it daily

[SlackerU]

Who'd have thought it's an extremely bad idea to have your body think your heart is being attached by covid multiple times per year for no-reason.

[GoldenArmsMusik]

I still don't have the vax and will never get it! I feel for the folks who were forced into it.

[SlackerU]

It's not a problem until some Billionaire doesn't have the 4th or 5th replacement heart needed for the extra 20+ years of life they have over any peasant.

[HeavyHardDrive]

The CDC said it's safe, so it has to be safe. They can't put it in the internet unless it's true

[rajs]

After vaccination my heart rate increase

[allo]

ever since i got the vaccine, every time i get my heart rate up my chest hurts

[phonepianist]

I should have paid attention in bio class...

[向你祖母問好]

Remember when this was called 'conspiracy theory'?😂

[noahs_ark]

It's going spiritual war for human souls. We are in the End Times...
🙏 Turn to the LORD before it's too late. 🙏
Jesus is the only way to GOD and heaven.

[truthboom]

rip life expectancy. most people die of old age because of large heart unable to pump enough blood

[annasusanti]

"rare"? You gotta be kidding me. It's so common, like 1 in 20-30 people I know. And it's only one of the many short term side-effects, the long term ones might well be lots and lots worse, deadly even.

[AdvKapatkarS]

Moderna has PRRA and entire spike patent since 2016 [US patent 9, 587, 003 filed on Feb. 4, 2016]
pfizer is mutagenic

[Victor-itbv]

My baby developed congenital heart problems. We concieved shortly after getting vaccinated. Not sure what the reason is but i suspect it had something to do with the vaccine.

[Azmodaeus]

I have taken both Astrazeneca and Pfizer Biontech last year and didn't get an inflamed heart or any other side effects and I'm 28 years old.

[SlackerU]

The heart issues heal themselves, believe them even if you don't know anyone tested.