Health officials and scientists are investigating what is leading to more admissions at younger ages and expect answers within two weeks.
Richard Lessels, an infectious disease specialist, says vaccines are the tool that can prevent serious illness and hospitalization.
A 29-year-old woman, who arrived from South Africa on the 21st, is under epidemiological investigation in the capital of Rio de Janeiro. Asymptomatic, she tested positive for covid-19.
WHO warns of "toxic mixture" of low vaccine coverage and insufficient testing of covid-19 and says it is the perfect recipe for breeding and augmenting variants.
WHO today warned of the high risk of infections with Ômicron. US President Joe Biden admitted that the variant is a concern, but ruled out a new lockdown in the country.