While health insurance card may pass scrutiny, they also may not. Depends on who is looking. Certainly, health insurance alone does not meet the stated criteria of a covid policy that provides coverage for 1) medical expenses, 2) medical repatriation expense, and 3) medical quarantine accommodation expenses. Policies that provide these benefits can be very inexpensive, depending on how close you are to travelling and your age. The closer to your travel date and the older you are, the more expensive they become. I have purchased ones for between $24-$40 per person for a two week trip with a lot of lead time.