herd immunity

When will the world reach the 80% vaccination target needed to produce herd immunity against Covid-19?

Singapore has been lowering its Covid-19 testing capacity in the past few days due to an issue at a laboratory which resulted in 33 “false positive cases” on May 10.

On April 15, the director general of the World Health Organization (WHO), Tedros Adhanom Ghebreyesus, made two Twitter postings that are cru­cial for the resumption of econom­ic activity. His tweets listed the observance of six condit