South Africa on Thursday ended mask-wearing for school children despite a surge of infections driven by two new Omicron sub-variants of coronavirus. 

Climate change will result in thousands of new viruses spread among animal species by 2070 — and that's likely to increase the risk of emerging infectious diseases jumping from animals to humans, according to a new study.

This is especially true for Africa and Asia, continents that have been hotspots for deadly disease spread from humans to animals or vice versa over the last several decades, including the flu, HIV, Ebola and coronavirus.

Workers put up fencing and police restricted who could leave a locked-down area in Beijing on Tuesday as authorities in the Chinese capital stepped up efforts to prevent a major COVID-19 outbreak like the one that has all but shut down the city of Shanghai.

People lined up for throat swabs across much of Beijing as mass testing was expanded to 11 of the city's 16 districts.

Fears of a hard Covid lockdown sparked panic buying in Beijing on Monday, as long queues for compulsory mass testing formed in a large central district of the Chinese capital.

Lu Muying died on April 1 in a government quarantine facility in Shanghai, with her family on the phone as doctors tried to resuscitate her. She had tested positive for COVID-19 in late March and was moved there in line with government policy that all coronavirus cases be centrally isolated.

But the 99-year-old, who was just two weeks shy of her 100th birthday, was not counted as a COVID-19 death in Shanghai's official tally. In fact, the city of more than 25 million has only reported 25 coronavirus deaths despite an outbreak that has spanned nearly two months and infected hundreds of thousands of people in the world's third-largest city.

The World Health Organization says that the number of reported new COVID-19 cases worldwide decreased by nearly a quarter last week, continuing a decline since the end of March.

The Geneva-based U.N. health agency said in a weekly report that nearly 5.59 million cases were reported between April 11 and 17, 24% fewer than in the previous week. The number of newly reported deaths dropped 21% to 18,215.

Greece aims to "coexist" with Covid-19, its health minister said Wednesday as the country prepared to further relax restrictions to boost its key tourism industry.

Spain took another step Wednesday toward a sense of normality amid the pandemic by partially ending the near two-year-long obligatory use of masks indoors.

The government decree, passed Tuesday, keeps masks mandatory for visitors and staff in medical centers and nursing homes, although patients won't always be obliged to wear them.

Shanghai allowed 4 million more people out of their homes Wednesday as anti-virus controls that shut down China's biggest city eased, while the International Monetary Fund cut its forecast of Chinese economic growth and warned the global flow of industrial goods might be disrupted.

A total of almost 12 million people in the city of 25 million are allowed to go outdoors following the first round of easing last week, health official Wu Ganyu said at a news conference. Wu said the virus was "under effective control" for the first time in some parts of the city.

Child vaccination rates in Lebanon have dropped by more than 30 percent, compounding a health crisis marked by drug shortages and an exodus of trained professionals, the United Nations said Wednesday.

"The critical drop in vaccination rates has left children vulnerable to potentially deadly diseases such as measles, diphtheria and pneumonia," the UN children's agency UNICEF said in a new report titled "A worsening health crisis for children".