Geneva - Omicron sub-variants BA.4 and BA.5 have been detected in more than a dozen countries, driving Covid-19 outbreaks across the world, according to the World Health Organization. According to WHO's technical lead on Covid, Maria Van Kerkhove, at least 16 countries have reported about 700 cases of BA.4, while more than 300 cases of BA.5 have been found across at least 17 countries SMACIN GRACEFULL TEAM Omicron sub-variants found in over a dozen countries, warns WHO The new sub-variants do not cause more severe infection than the original Omicron strain, but they appear to be more contagious, Van Kerkhove was quoted as saying during a Q&A on the organisation’s social media platforms on Wednesday. AD AD EMA hopes to approve variant-adapted vaccines by autumn The European drug regulator on Thursday (May 5) said it hopes to have vaccines adapted to ad