If you wanted proof, here is the officail word from the EFL.
Rotherham United have recorded 25 positive Covid-19 cases in the latest week of testing.
The English Football League said 25 positive tests had been found among 5,533 players and staff from 72 clubs, with 71 returning no positive results.
Statistically speaking I find it very hard to believe that there have been NO other positive results from the other 71 clubs but as someone once said "I can prove anything by statistics except the truth."