From what little I know about "herd immunity" it would seem a bare minimum requires 75% efficacy of the vaccine with 100% vaccination. Since this flu vaccine i

From what little I know about "herd immunity" it would seem a bare minimum requires 75% efficacy of the vaccine with 100% vaccination. Since this flu vaccine is only 62% effective, I come to the conclusion that there is no herd immunity effect for flu, even if somehow everyone got the flu shot. (am willing to be corrected if I am wrong)