I spent countless hours flying and in airports since late 2019. Then the entire year of 2020 in the US, trying to get back to VN. Never contacted Covid ( Or if I did, I didn't know it ). This last time back to VN, she felt sick in April and tested positive, insisted I test as well. Yup I got it while in VN. But never a symptom. Tested 3 days later and was negative....Go Figure.......:realcrazy: