Nearly two thirds of Russians are not willing to receive Russia’s Sputnik V vaccine, and about the same number believe the new coronavirus was created artificially as a biological weapon, an independent pollster said on March 1.

After months of touting its efficacy to the western world, the efficacy of Russia’s Sputnik V vaccine was validated in a peer-reviewed study published in The Lancet.

China’s CanSino Biologics Inc. said an independent committee found the drugmaker’s Covid-19 vaccine met its pre-specified primary safety and efficacy targets under an interim analysis of Phase 3 trial data.

Human trials of a coronavirus vaccine combining Russia’s Sputnik V shot with that developed by Britain’s AstraZeneca and Oxford University are expected to start in early February, the chairman of Russian drugmaker R-Pharm told Reuters.

Countries across the globe shut their borders to Britain on Dec. 21 due to fears about a highly infectious new coronavirus strain, causing travel chaos and raising the prospect of food shortages days before Britain is set to leave the European Union.

A Covid-19 vaccine being developed by CSL Ltd. and the University of Queensland was scrapped after numerous vaccine recipients reported receiving false positives on certain HIV tests, according to the Wall Street Journal.

U.S. coronavirus cases crossed the 15 million mark on Dec. 8 as regulators moved a step closer to approving a Covid-19 vaccine and Britain started inoculating people, offering hope of slowing a pandemic that killed 15,000 Americans in the previous week.

A 90-year-old grandmother became the world’s first person to receive a fully tested Covid-19 shot on Dec. 8, as Britain began mass-vaccinating its people in a global drive that poses one of the biggest logistical challenges in peacetime history.

Moscow began distributing the Sputnik V Covid-19 shot via 70 clinics on Dec. 5 to the most exposed groups, marking Russia’s first large-scale vaccination against the disease, the city’s coronavirus task force said.

The United Kingdom’s Medicines & Healthcare Products Regulatory Agency (MHRA) granted temporary authorization for emergency use to Pfizer and BioNTech for the companies’ mRNA vaccine BNT162b2, marking the first Western country EUA for a Covid-19 vaccine.