Read the text and fill in the gaps with the correct form of verbs and subject-verb agreement as per context.

COVID-19 (a) _____ (transmit) when people (b) _____ (breathe) in air contaminated by droplets and small airborne particles (c) _____ (contain) the virus. The risk of breathing these in (d) _____ (be) highest when people (e) _____ (be) in close proximity, but they (f) _____ (inhale) over longer distances, particularly indoors. Transmission also (g) _____ (occur) if splashed or (h) _____ (spray) with contaminated fluids in the eyes, nose or mouth, and rarely via contaminated surfaces. People remain contagious for up to 20 days, and (i) _____ (spread) the virus even if they (j) _____ (not develop) symptoms.