Can covid come back after two days ?

COVID 19: Are you asking about having a positive result, recovering with a negative test result - followed by a positive result on testing? Or are you asking about a lull in symptoms followed by an increase in symptoms? COVID symptoms don't always follow a linear course- so it is likely the same infection if there has been two days with relatively few sxs'. The former can occur - but don't know number of

Prolonged: Symptoms may be prolonged, watch for signs of cough, shortness of breath and fevers. Rapid changes may occur, and then see the Emergency room.