would like to know if i need to take another PCR test to travel to Canada in Germany since i have Connected Flight . My flight will be from Tunisia-Germany-Canada with 4 hours transit in the same airport. The test from Tunisia will be valid while i am in transit in Frankfort. So my question here do i need to take another test so i can board my flight ? or the valid one from the departure country is enough ? the information on the web are confusing me.