US authorities have warned about the possibility of vaccinated to transmit the delta strain

Some people who are fully vaccinated against COVID-19 can transmit the Indian strain of coronavirus (delta strain) to others, including the unvaccinated, said Rochelle Walensky, head of the US Centers for Disease Control and Prevention ( CDC). Her words are quoted by NBC News.

She clarified that vaccines do an "exceptional job" in protecting citizens from the severe course of COVID-19, hospitalizations and death. However, in some cases, when fully vaccinated people become infected with the virus, its burden on the body is similar to that of an infected unvaccinated person.

It could follow, Walensky said, that people infected with the delta variant can be highly contagious. This can put at risk children who have not reached the age of vaccination, people with weak immunity and, in general, those who have not been vaccinated, the head of the CDC emphasized.

Scientists, as well as the World Health Organization (WHO), have previously agreed that the Indian strain of coronavirus is much more contagious than the original version.