Yyyeah just judging by the size of the spider, Peter's sure that if literally anyone else had been bitten, they'd be super dead right now. If his were to go untreated, Peter can't say whether or not his healing factor would be enough to combat the venom on it's own, but thankfully Cho seems to have a good idea of what she's doing. Peter might be a little worried, but he's not on the verge of panic or anything.

"About 150, give or take." Though it might be less now, since he hasn't been eating as much as he should be lately, but not by too much.