Yes this is possible, I have discussed it with another experienced player; it would have to be a cheater to have shot me the way I was positioned.

In T168031#2368884, @Geez wrote:

Hello simonymous.
Salmonella infection also has pain symptom same as Wound infection at 1st stage, player vision gets blurred for one second at the moment when character makes pain noise, pain symptom is triggered every 20-30 second when it reaches maximum.
Could this be the case?
Regards,
Geez

I deliberately got a wound infection from treating a wound with unsterile bandages and it respodned to a) iodine tincture in the first 20 mins, repeated the process and waitied 30 mins, the disease responded to tetracycline

I have the same issues with the same symptoms