Actually recently one news is released that Canadian govt has removed the restrictions for COVID 19 testing that should be done 18 hrs before the departure but this yet not available on their site so and Canadian govt said that -ve report of COVID 19, can be obtained from any lab affiliated to ICMR 72 hrs before the departure so now what should I do. Should i take the report 18 hrs prior to my flight or 72 hrs before? Please guide