The head of the World Health Organization says he's worried about the omicron and delta variants of COVID-19 producing a "tsunami" of cases between them.
The head of the World Health Organization says he's worried about the omicron and delta variants of COVID-19 producing a "tsunami" of cases between them.
The head of the World Health Organization says he's worried about the omicron and delta variants of COVID-19 producing a "tsunami" of cases between them.
The head of the World Health Organization says he's worried about the omicron and delta variants of COVID-19 producing a "tsunami" of cases between them.
The head of the World Health Organization says he's worried about the omicron and delta variants of COVID-19 producing a "tsunami" of cases between them.