
Trials in Brazil show the Chinese COVID-19 vaccine Sinovac to be 50.38% effective, nearly 30 percentage points below the initial results released last week. The Instituto Butantan, the São Paulo-based research institute responsible for developing the vaccine and conducting trials in the country, announced last week the vaccine had a 78% overall efficacy, with total protection against severe cases.

All air travelers arriving in the United States will need to present a negative coronavirus test, according to the latest announcement. Under the rules taking effect Jan. 26, travelers including U.S. citizens must show a negative test within three days of departure or documentation of recovery from COVID-19, under an order signed by U.S. Centers for Disease Control and Prevention (CDC) Director Robert Redfield.

Ireland is set to receive 1.05 billion Euros (US$ 1.28 billion) this year from a European Union fund for countries worst affected by Britain's exit from the European Union, Irish Foreign Minister Simon Coveney said on Tuesday.

Mexican health authorities will make a decision this week on whether to authorize Russia's Sputnik V COVID-19 vaccine after getting access to data on it, Deputy Health Minister Hugo Lopez-Gatell said on Tuesday.

Chilean President Sebastian Piñera and his wife Cecilia Morel are to begin preventive quarantine after coming into close contact with a person later diagnosed to have COVID-19, the president's press office said on Tuesday.

President-elect Joe Biden anticipates three main issues of his starting time in office, cabinet nominations, Trump's impeachment proceedings, and coronavirus and economic aid.

The Falkland Islands Government informed on Tuesday in a Press Release that it is “pleased” to announce that 3,000 doses of the Oxford-AstraZeneca vaccine are expected to be received in the first week of February 2021.

BioNTech, the co-producer of Pfizer’s Covid-19 vaccine, boosted the 2021 delivery target for their product to 2 billion doses, up from 1,3 billion previously as they bring new production lines on stream and as more doses can be extracted per vial.

The World Health Organization (WHO) will send experts to China on Thursday and work with Chinese peers to investigate the origin of COVID-19, said China's National Health Commission (NHC).

Residents of foreign countries have obtained COVID vaccinations in Florida, taking advantage of the state’s loose rules on who can get a shot. The list includes a prominent Argentine lawyer, business leaders, and Canadians whose home countries restrict vaccines to first-responders, medical personnel, and a few other groups.