Comparing myocarditis post-covid-19 or post-vaccine: For this, I'd exclude research that's fishing expeditions. If you do population surveillance, you'll find undiagnosed cases; so the alarmist papers about post-covid-19 cases made invalid assumptions.
In terms of the basic correlation -- hospital-identified myocarditis in patients diagnosed with covid-19 was 0.146%, vs a baseline of 0.009% for patients not diagnosed with covid-19 -- supporting the assertion that acute infection is associated with an increased rate of myocarditis: https://www.cdc.gov/mmwr/volumes/70/wr/mm7035e5.htm
I believe it was Dr. Peter McCullough who said that the myocarditis caused by the Covid vaccines is far more serious and damaging than the kind caused by natural Covid infection.
He has made such a claim ... in an article which was retracted by the publisher. Here's an article which specifically responds to a similar claim (I think in response to H├╕eg et al):
Relevant quote: "In the end, the risk of COVID vaccine myocarditis is larger than vaccination with many classical vaccines, but the absolute risk is still very, very small тАУ and far smaller than the disease itself."
1. Not my field, but the median appears to be 600 minutes in humans ( http://book.bionumbers.org/how-fast-do-rnas-and-proteins-degrade/ ). 2. A few weeks. ( https://www.nebraskamed.com/COVID/where-mrna-vaccines-and-spike-proteins-go ) ; 3. ribosomes. I've read people hypothesizing that LINE or SINE genes can integrate genes for the spike protein, but no evidence of this happening, let alone at scale.
Comparing myocarditis post-covid-19 or post-vaccine: For this, I'd exclude research that's fishing expeditions. If you do population surveillance, you'll find undiagnosed cases; so the alarmist papers about post-covid-19 cases made invalid assumptions.
https://pubmed.ncbi.nlm.nih.gov/34341797/ (see
https://www.newscientist.com/article/mg25133462-800-myocarditis-is-more-common-after-covid-19-infection-than-vaccination/ for a write up for a lay audience) does an analysis based on data from hospitals, focused on young people, finding that the rate of myocarditis in 3 months following illness was ~450/million, or around 6x the rate estimated elsewhere for vaccines ( ~66.7/million; this is higher than the overall population incidence because of the age group).
In terms of the basic correlation -- hospital-identified myocarditis in patients diagnosed with covid-19 was 0.146%, vs a baseline of 0.009% for patients not diagnosed with covid-19 -- supporting the assertion that acute infection is associated with an increased rate of myocarditis: https://www.cdc.gov/mmwr/volumes/70/wr/mm7035e5.htm
Both https://jamanetwork.com/journals/jamainternalmedicine/fullarticle/2784800 and https://www.nejm.org/doi/full/10.1056/NEJMoa2110737 show a non-zero rate of myocarditis which is well below the 66.7/million rate above.
I believe it was Dr. Peter McCullough who said that the myocarditis caused by the Covid vaccines is far more serious and damaging than the kind caused by natural Covid infection.
He has made such a claim ... in an article which was retracted by the publisher. Here's an article which specifically responds to a similar claim (I think in response to H├╕eg et al):
https://sciencebasedmedicine.org/myocarditis-and-how-to-think-about-it-like-a-cardiologist/
Relevant quote: "In the end, the risk of COVID vaccine myocarditis is larger than vaccination with many classical vaccines, but the absolute risk is still very, very small тАУ and far smaller than the disease itself."