Prime Minister Jacinda Ardern said the country would begin to ease strict border controls and quarantine rules for citizens and travelers who have received at least two doses of a Covid-19 vaccine.

Dr. Vivek Murthy, the surgeon general, pledged that the Pfizer-BioNTech vaccine for children younger than 5 would undergo a full 'transparent review process' by the Food and Drug Administration before receiving authorization.

The president announced the ambitious goal of cutting the cancer death rate in half. The pledge was part of an effort to revive the cancer 'moonshot' program he initiated as vice president.

Hundreds of demonstrators took to the streets of the capital, Lima, to accuse the Spanish company Repsol of downplaying the impact of the spill, which sent thousands of barrels of crude oil into the sea.

Thousands of residents were ordered to leave a neighborhood in Winston-Salem, N.C., over worries of a possible explosion, as the fire continued burning for the second day.

President Vladimir V. Putin of Russia said that the United States was trying to pull Russia into an unwanted armed conflict over Ukraine.

The designation came as President Biden sought to boost natural gas supplies to Europe and reassure allies they would not face shortages if a war between Ukraine and Russia breaks out. Qatar is a major natural gas producer.

Sajid Javid, the British health secretary, said the mandate, which requires National Health Service workers to be fully vaccinated by April 1, might not be 'proportionate' to the threat posed by Omicron.

The parents of Ahmaud Arbery criticized an attempt by the Justice Department to strike plea deals with two of the three men who face federal hate crime charges for his killing. A judge rejected the agreements.

Carrie Lam, the Hong Kong chief executive, announced the resignation of the home affairs secretary Caspar Tsui after he attended a birthday party unmasked amid a surge in coronavirus infections.