I don't remember what actually happends when people eat infected flesh. I have in mind :

Gareth and the cannibals eating bitten Bob's leg in S05E03, Four Walls and a Roof. It seems that the cannibals survive for a while after eating Bob's flesh and they seem OK.

The Saviors eating pigs that ate walkers in S07E02, The Well. We don't know for how long this process has been on, but Richard has his routine and looks used to doing that. Can we assume that Saviors are eating infected pig flesh for a while now ?

Does it have negative effect in long term ?