WestJet Airlines said on Thursday it had denied 10 passengers from boarding a flight for lacking the proper test for the novel coronavirus, just after a Canadian government requirement that passengers show proof of a negative result before boarding took effect. Faced with a mounting second wave of infections, Canadian Transport Minister Marc Garneau said last week that air travelers aged 5 and up would need to test negative for the coronavirus before boarding the plane, starting on Jan. 7. The global airline industry has been calling for COVID-19 testing as a way to ease travel restrictions and reopen borders without crippling quarantine measures, although Canada still requires international passengers to self-isolate for 14 days. News of the surprise Canadian measure left airlines fearful of possible confusion over which testing facilities abroad for the coronavirus were eligible and how the results from the PCR (polymerase chain reaction) test must be …