See what's going on in your stomach and for pregnacy
Muscular Strength: the ability of the muscles to exert a force. The maximum amount of force that a muscle can generate in a single effort.
You can catch the flu, but HIV you can't if its inactive, but you can catch the flu if it still active
Hope this helps! :)
If you really can't move your arm because of the sting, and there is pus, the best thing you can do to yourself is go to the Emergency doctor. You can take an ibuprofen if the pain is too hard.