For many who get an mRNA COVID vaccine like Moderna or Pfizer-BioNTech, arm soreness is a common experience post-vaccination. But in some cases, there's also what's being called "COVID arm." "COVID ...
Subcutaneous (subQ or SQ) injections are shots given in the fatty tissue layer (subcutaneous fat) under your skin. Your skin has many layers, and the subcutaneous layer is beneath the epidermis and ...