Countries Where Covid-19 Omicron Variant Has Existed

The US president's office also said that Fauci believed that current vaccines could possibly protect against severe cases of Covid-19.

Biden would on Monday deliver the latest developments on the new variant and the steps the United States would take to address it, the White House said.

In the UK, the government has announced a number of measures, including strict testing rules for people arriving in the country.

The government also requires the use of masks in several types of locations.

A growing number of countries, including Indonesia and Saudi Arabia, announced on Sunday that they were imposing travel bans on African countries.

South Africa denounced the ban, calling it unfair and possibly damaging its economy.

South Africa said it felt punished precisely when it showed its scientific ability in identifying variants of the coronavirus early.

South African President Cyril Ramaphosa said Sunday his government was considering imposing mandatory Covid-19 vaccinations on citizens in certain places and with certain activities.