COVID-19 is a highly contagious virus that is 3.5 times more deadly than the seasonal flu. It spreads through respiratory droplets when people are in close contact. There are several variants of concern that spread more easily. Getting exposed can lead to asymptomatic, pre-symptomatic, or symptomatic infection. Common symptoms include cough, fever, and shortness of breath. Prevention strategies include vaccination, physical distancing, masks, hand hygiene, and isolation of infected individuals. Treatment focuses on symptom relief and secondary prevention to avoid further spread.