Medical workers converse among themselves at a quarantine center for Covid-19 coronavirus infected patients at a banquet hall that was converted into an isolation center to handle the rising cases of infection on April 15, 2021 in New Delhi, India.Anindito Mukherjee | Getty Images News | Getty ImagesLONDON — The U.S., Canada and U.K. are among some of the high-income countries actively blocking a patent-waiver proposal designed to boost the global production of Covid-19 vaccines.It comes as coronavirus cases worldwide surge to their highest level so far and the World Health Organization has repeatedly admonished a “shocking imbalance” in the distribution …
