The drug maker Pfizer announced on Monday that an early analysis of its coronavirus vaccine trial suggested the vaccine was robustly effective in preventing Covid-19, a promising development as the world has waited anxiously for any positive news about a pandemic that has killed more than 1.2 million people.
Astrazeneca's Covid-19 vaccine has been granted approval for emergency use in Pakistan, the country's health minister said on Saturday, the first vaccine against...
