Leg pain is also frequently a sign of injury, such as the following: Muscle strain is a common injury that happens when the muscle fibers tear as a result of overstretching. It often occurs in the larger muscles, such as the hamstrings, calves, or quadriceps.
medical Definition of superinfection : a second infection superimposed on an earlier one especially by a different microbial agent of exogenous or endogenous origin that is resistant to the treatment used against the first infection
Superantigens (SAgs) are small bacterial or viral proteins that bind MHC class II molecules outside the peptide-binding groove and activate up to 20% of the T cell repertoire in a VÎ²-specific manner [1] and [2] .