beijing chinas national health commission said on thursday it would strengthen supervision over nucleic acidbased covid testing after a handful of labs were punished for violations that affected accuracy during beijing citys testing drives during mass testing campaigns amid local outbreaks laboratories must keep visual records of key processes of the testing and health authority must launch investigation when and if false negative or false positive results emerge the nhc said in a statement chandigarh no fresh covid case has been reported from the tricity on tuesday while three cases are active in chandigarh two are active in mohali meanwhile chandigarh received fresh covishield vaccine from the centre on tuesday and it will be available at gmsh 16 from wednesday beneficiaries who have not taken their 1st2nd dose may take it at the spot tnn