Washington (AFP): The Pfizer Covid-19 vaccine proved 94 percent effective in a huge real world study published Wednesday that involved 1.2 million people in Israel, confirming the power of mass immunization campaigns to end the Covid-19 pandemic.
The good news came as Ghana became the first country to receive shots under the global Covax scheme, paving the way for poorer nations to catch up with wealthier parts of the world.
