The US Centers for Disease Control and Prevention (CDC) has changed vaccination recommendations without announcement, now patients are allowed to be vaccinated against coronavirus with various drugs. However, the result of mixing vaccines has not yet been studied, the center noted.
As reported by the New York Times, the new recommendations were posted on the cent’s website back on January 21, but there were no special notices. Patients will be able to swap one US-approved drug for another between two doses, but in “exceptional situations”. The fact is, added the center, that mixing vaccines, its safety and effectiveness have not yet been studied.
The CDC also allowed an increase in the interval between doses of the vaccine to six weeks, if it is not possible to enter a second dose earlier.