UK to require pre-departure negative COVID test amid Omicron fears

• The country first detected the new strain late last month in two travelers returning from southern Africa. In response, Prime Minister Boris Johnson implemented a requirement that anyone entering the U.K. must self-isolate until receiving a negative coronavirus test and reinstated rules on wearing masks "in shops and on public transport."

What they're saying: "In light of the most recent data we are taking further action to slow the incursion of the Omicron variant," British Health Secretary Sajid Javid said in a tweet announcing the measures.

• "Vaccines remain our first line of [defense] — the best way to protect yourself and your loved ones," he continued.