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The world has never been in a better position to end the Covid-19 pandemic, the head of the World Health Organization said on September 14, his most optimistic outlook yet on the years-long health crisis which has killed over six million people. "We are not there yet. But the end is in sight," WHO Director-General Tedros Adhanom Ghebreyesus told reporters at a virtual press conference. That was the most upbeat assessment from the UN agency since it declared an international emergency in January 2020 and started describing Covid-19 as a pandemic three months later. The virus, which emerged in China in late 2019, has killed nearly 6.5 million people and infected 606 million, roiling global economies and overwhelming healthcare systems. The rollout of vaccines and therapies have helped to stem deaths and hospitalisations, and the Omicron variant which emerged late last year causes less severe disease. Deaths from Covid-19 last week were the lowest since March 2020, the U.N. agency reported.

Lapses in strategies to tackle COVID-19 this year continue to create the perfect conditions for a deadly new variant to emerge, as parts of China witness a rise in infections, the head of the World Health Organization said on Friday (December 2). The comments by WHO Director-General Tedros Adhanom Ghebreyesus mark a change in tone just months after he said that the world has never been in a better position to end the pandemic. "We are much closer to being able to say that the emergency phase of the pandemic is over, but we're not there yet," Tedros said on Friday. The global health agency estimates that about 90% of the world's population now has some level of immunity to SARS-COV-2 either due to prior infection or vaccination. "Gaps in testing … and vaccination are continuing to create the perfect conditions for a new variant of concern to emerge that could cause significant mortality," Tedros said. COVID-19 infections are at record highs in China and have started to rise in parts of Britain after months of decline.

The British scientists behind one of the major therapeutic Covid-19 trials have turned their focus to treatments for monkeypox, a viral disease that has been labelled a global health emergency by the World Health Organization. The team from Oxford University behind the so-called RECOVERY trial - which honed in on four effective Covid treatments - on Tuesday unveiled a new trial, dubbed PLATINUM, to confirm whether Siga Technologies' tecovirimat is an effective treatment for monkeypox. Although there are vaccines developed for the closely related smallpox that can reduce the risk of catching monkeypox, there are currently no treatments that have been proven to help hasten recovery in those who develop the disease. The UK has over 3,000 confirmed cases of monkeypox. The virus is transmitted chiefly through close contact with an infected person. It typically causes mild symptoms including fever, rash, swollen lymph nodes and pus-filled skin lesions. Severe cases can occur, though people tend to recover within two to four weeks. Siga's drug, branded Tpoxx, has been cleared to treat diseases caused by the family of orthopoxvirus that includes smallpox, monkeypox and cowpox by the European Union and United Kingdom, but due to limited trial data it is generally only used in severe cases in Britain.

Existing Covid-19 inoculations will struggle against the fast-spreading Omicron variant, the head of vaccine manufacturer Moderna warned on Tuesday (November 30), as countries ramp up vaccination programmes and impose further restrictions in an effort to curb growing concern. First reported to the World Health Organization in South Africa less than a week ago, the new strain has rapidly spread from Africa to the Pacific, and from Europe to North America as dozens of countries have announced travel restrictions. While no deaths have yet been reported from Omicron, and it could take weeks to know how infectious and how resistant the strain may prove to vaccines, its emergence underscores how besieged the world remains by Covid-19, nearly two years after the first cases were recorded. Stephane Bancel, the head of US vaccine manufacturer Moderna, told the Financial Times in an interview published today that data would be available on the effectiveness of vaccines in the two weeks' time, but that scientists were pessimistic.

The World Health Organization says it is tracking a few dozen cases of two new sub-variants of the highly transmissible Omicron strain of the coronavirus to assess whether they are more infectious or dangerous. It has added BA.4 and BA.5, sister variants of the original BA.1 Omicron variant, to its list for monitoring. It is already tracking BA.1 and BA.2 - now globally dominant - as well as BA.1.1 and BA.3. The WHO said on Monday (April 11) it had begun tracking them because of their "additional mutations that need to be further studied to understand their impact on immune escape potential". Viruses mutate all the time but only some mutations affect their ability to spread or evade prior immunity from vaccination or infection, or the severity of disease they cause. For instance, BA.2 now represents nearly 94% of all sequenced cases and is more transmissible than its siblings, but the evidence so far suggests it is no more likely to cause severe disease.