Respiratory syncytial virus (RSV) is a common virus that affects the nose, throat, and lungs. For most healthy adults and children, it causes only mild, cold-like symptoms and goes away on its own.

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 ...