I saw a thread of many women talking about similar issues in a pro-vaccine Seattle group (where younger people were looking to get extra vaccine doses before the vaccines were open to all ages). There are also threads in women's subreddits.
There is a preliminary report from the Israeli MOH (so far, only in Hebrew) that estimates vaccine-induced myocarditis incidence at 1:20,000 for the 16-30 group, and 1:100,000 overall. The report text says they have trouble getting good estimates of relevant myocarditis background rates - so they might be overestimating the incidence - but that they feel there is reason to take note, and have therefore published these preliminary results and submitted them to the FDA and Pfizer.
It's unclear to me (and apparently to the people doing this research - they state they haven't been able to figure that out yet).
It is clear, though, that not everyone gets covid, but (in Israel) essentially everyone gets the vaccine (>80% of age>16 already), so a vaccine must be significantly safer than the disease it prevents.
Furthermore, the most worrying signal they remark on is that covid myocarditis seems to increase with older age, whereas post-vaccine myocarditis seems to increase with lower age.
I've read a hypothesis that bits of free vaccine mRNA migrate in the blood, and if taken by heart muscle cells, will cause the immune system to potentially attack those heart cells when they actually express the S protein -- especially if there is some prior immunity (previous infection or cross immunity). I don't know enough to judge its likelihood myself.
Only thing I take from reading this report is that the vaccine safety is not to be taken for granted the way it has been so far with the massive deployment in Israel.
> She said it was also possible that it’s simply the result of psychological distortions that relate to what she called the law of large numbers. “When a large number of women of child-bearing age get vaccinated at the same time, the moment that someone notes the phenomenon of bleeding as linked to the vaccination, others also begin seeing the connection,” she said.
> She added, however, that “It’s very important to monitor this. Even if it turns out that there is some kind of connection, it doesn’t necessarily mean that there’s a problem or a reason [not to get vaccinated]," like a headache as a side effect that does not prevent people from getting vaccinated. "One way or another, the system has to be attentive and seriously address reports of such a phenomenon,” Lotan added.”
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[ 4.7 ms ] story [ 23.0 ms ] threadIt is clear, though, that not everyone gets covid, but (in Israel) essentially everyone gets the vaccine (>80% of age>16 already), so a vaccine must be significantly safer than the disease it prevents.
Furthermore, the most worrying signal they remark on is that covid myocarditis seems to increase with older age, whereas post-vaccine myocarditis seems to increase with lower age.
I've read a hypothesis that bits of free vaccine mRNA migrate in the blood, and if taken by heart muscle cells, will cause the immune system to potentially attack those heart cells when they actually express the S protein -- especially if there is some prior immunity (previous infection or cross immunity). I don't know enough to judge its likelihood myself.
Only thing I take from reading this report is that the vaccine safety is not to be taken for granted the way it has been so far with the massive deployment in Israel.
> She added, however, that “It’s very important to monitor this. Even if it turns out that there is some kind of connection, it doesn’t necessarily mean that there’s a problem or a reason [not to get vaccinated]," like a headache as a side effect that does not prevent people from getting vaccinated. "One way or another, the system has to be attentive and seriously address reports of such a phenomenon,” Lotan added.”