So news sites reported about Oregon "covid cases" with people vaccinated (Both shots). It should be no surprise since the MRNA vaccines are 95% effective overall in the Phase 3 studies. I wonder if some people will point to it and say "See the vaccines really do not work, so why should I take it". To me the cases (given the current count) do not even warrant being emphasized in a news article.
So what are the numbers from the phase 3 trial?
https://www.nejm.org/doi/suppl/10.1056/NEJMoa2034577/suppl_file/nejmoa2034577_appendix.pdf
If the virus is no more contagious than before then the phase 3 Pfizer study had 43,448 participants. Half with Placebo. In the time frame monitored in the paper 8 vaccinated (+7 days since second shot) and 162 placebo got Covid.
Now the Oregon total time since second shot may (or may not) be less than the study time post second shot, but if it was the same then we could expect (If Oregon shots/2 equals second shot +7 days in Oregon [It won't the real number will be less])
We should expect
Oregon fully vaccinate = <(677,000/2)
Study fully vaccinated = (43448/2)
Expected Oregon fully vaccinated covid cases = ~ 677000/43448 *8= ~ 124 cases
Actual cases = 4 cases
Now total time in trial vs in Oregon was not compensated for in the above formula.
But no one should be surprised that some get Covid even after fully being vaccinated. The severity may be less, and the chances of getting is less. But people's immune systems vary. That is one reason why they do a Phase 3 study.
The article below does say that the cases are expected, but unless other news organization are reporting it and say it is unexpected, it would seem to not be newsworthy.
Health officials in Oregon said they are investigating four so-called “breakthrough” cases of coronavirus that were detected in individuals two weeks after they received their second dose of vaccine.
www.foxnews.com