We already see that the Coivd vaccine is being combined with flu shots. For the majority of the people who get those each year it will not be much of a change.
I am already highly resistant to flu and have not had a flu shot in 55 years. I have not had flu or colds in 16 years. The difference is D3 supplements. In the Florida Keys no supplement would be needed, just short sleeves and some outside time each day.