| | The U.S. Environmental Protection Agency on Monday revived an Obama administration-era legal finding that regulating hazardous air toxics and mercury from power plants is necessary, a key step before it can strengthen those air regulations. | | | South Africa no longer requires those who test positive for COVID-19 without symptoms to isolate and has also reduced the isolation period for those with symptoms by three days, as the country exits its fourth wave of the coronavirus, a government statement said on Monday. | | | The U.S. Centers for Disease Control and Prevention (CDC) on Monday advised against travel to a dozen destinations, including Mexico, Brazil, Singapore, Ecuador, Kosovo, Philippines and Paraguay. | | | The following is a summary of some recent studies on COVID-19. They include research that warrants further study to corroborate the findings and that has yet to be certified by peer review. | | | During the past four days China has detected 119 cases among athletes and personnel involved in the Winter Olympics. | | | Novavax Inc said on Monday it has filed for emergency use authorization of its COVID-19 vaccine for U.S. adults, a long-awaited step for the company following months of struggles with development and manufacturing problems. | | | The British government said on Monday it planned to revoke mandatory COVID-19 vaccinations for health workers in England after warnings that an already-stretched service could face crippling staff shortages. | | | U.S. podcaster Joe Rogan apologized and pledged more balance on his show amid a backlash against COVID-19 misinformation on the streaming service that wiped more than $2 billion off its market value last week. | | | Amnesty International on Monday accused Spanish prosecutors of failing to properly investigate scores of cases linked to the COVID-related deaths of residents of nursing homes. | | | French artificial heart maker Carmat said on Monday it would resume implants of its Aeson artificial heart in October, after it suspended them in December because quality issues affected some of the devices. | | | | |