coronavirus case positivity for 10 weeks, a decline has been reported since the last two weeks, the Centre said today.The number of districts reporting a decline in case positivity increased from 210 in April 29-May 5 to 303 districts on May 13-19.As per reports, seven states have over 25% case positivity, while 22 states have more than 15% case positivity, the Centre added.The country witnessed a consistent upward trend in weekly tests for Covid-19 since mid-February and average daily tests increased by 2.3 times in 12 weeks, it said.50% people still do not wear a maskThe Union Health Ministry on Thursday said that 50%people still do not wear a mask while 64% of the people who do wear masks, do not cover the nose, according to a study.At a.