Line 32:20·'NSIP' has no definition. Spell it out if it's unfamiliar to the audience.
Commas
suggestion
"Fever, chills, myalgia, headaches, coughing, chest tightness, dyspnoea, and leucocytosis can occur in various combinations and typically occurs 4-12 hours after exposure 1-3."
Line 5:16·More than 5 commas in a single sentence might make it more difficult to read.