Factbox-Latest on the worldwide spread of the coronavirus The World Trade Organization said risks from the uneven roll-out of coronavirus vaccination campaigns and the possible emergence of vaccine-resistant strains clouded the outlook for the global trade in goods, while raising its growth forecast slightly. Reuters Staff U.S.

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* All health workers in Italy must have coronavirus jabs, the government said, in a potentially controversial move aimed at protecting vulnerable patients and pushing back against ‘no-vax’ sentiment.

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It was three months after rich countries began vaccinating health workers, but Kenyans like the nurse, Stella Githaiga, had been left behind: Employed in the country’s largest public hospital, she caught the coronavirus on an outreach trip to remote communities in February, she believes, sidelining her even as Kenya struggles with a vicious third surge of infections.

Ms. Githaiga and her colleagues are victims of one of the most galling inequities in a pandemic that has exposed so many: Across the global south, health workers are being sickened and killed by a virus from which doctors and nurses in many rich countries are now largely protected.

That is just the most visible cost of a rich-poor divide that has deepened in the second year of the pandemic. Of the vaccine doses given globally, roughly three-quarters have gone to only 10 countries. At least 30 countries have not yet injected a single person.

Why COVID vaccines are so difficult to compare Despite the widespread roll-out of several vaccines, it could be months before they can be ranked. Heidi Ledford nature

Yusuff Adebayo Adebisi knows that a vaccine that offers 70% protection against COVID-19 could be a valuable tool against the coronavirus pandemic in Nigeria — especially if that vaccine is cheap and doesn’t have to be stored at extremely cold temperatures. But what if another vaccine — one that is more expensive to buy and to store — was 95% effective?