The American CDC updated their recommendations for Covid booster vaccinations this week: For immunocompromised patients there is now one fourth dose of vaccine recommended.
According to the CDC, immunosuppressed people should receive a third vaccination as soon as possible (from four weeks after the second vaccination) after receiving the usual two doses of an mRNA vaccine. If you do not have this yet, you should do so immediately. Six months after the third shot, a fourth dose of vaccine administered.
Exceptions are patients who have been vaccinated with Johnson & Johnson. These should only receive another shot with an mRNA vaccine.
Incidentally, the mRNA vaccines have not been scientifically tested on immunocompromised patients – immunodeficiency is a feature in clinical studies Exclusion criterion for test subjects. So you poke around with such recommendations without a database on the safety and effectiveness of the vaccines in this patient group in the dark and acts according to the motto “a lot helps a lot”.
No further dose for vaccinees with myocarditis
According to the CDC, patients who have developed myocarditis or pericarditis after being vaccinated with an mRNA vaccine should initially refrain from further vaccination.
It is unclear whether people who developed myocarditis or pericarditis after a dose of a mRNA COVID-19 vaccine could be at increased risk of other cardiac side effects after a subsequent dose of the vaccine. Until additional safety data is available, experts recommend that people who develop myocarditis or pericarditis after a dose of an mRNA COVID-19 vaccine postpone another dose.
Those (Status: October 28, 2021, translated into German)