New Delhi, Dec. 4 -- The big questions -- whether the newest variant of concern (VOC) is more transmissible, more resistant to vaccine or past infection immunity, or more virulent - are likely to take some time to be answered. To determine these, experts will need to wait for adequate epidemiological and clinical data. At the least, cases need to be watched for three weeks, the time by when infections usually completely resolve or take a turn for the worse....