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Recently published research found that on average, the time from exposure to symptom onset (known as the incubation period) is about five to six days. However, studies have shown that symptoms could appear as soon as three days after exposure to as long as 13 days later.

The incubation period for COVID-19, which is the time between exposure to the virus (becoming infected) and symptom onset, is on average 5-6 days, however can be up to 14 days. During this period, also known as the pre-symptomatic period, some infected persons can be contagious. Therefore, transmission from a pre-symptomatic case can occur before symptom onset.

See full answer asymptomatic laboratory-confirmed case is a person infected with COVID-19 who does not develop symptoms. Asymptomatic transmission refers to transmission of the virus from a person, who does not develop symptoms. There are few reports of laboratory-confirmed cases who are truly asymptomatic, and to date, there has been no documented asymptomatic transmission. This does not exclude the possibility that it may occur. Asymptomatic cases have been reported as part of contact tracing efforts in some countries. WHO regularly monitors all emerging evidence about this critical topic and will provide an update as more information becomes available.

The most common symptoms are fever, cough, shortness of breath, and breathing difficulties. In more severe cases infection can cause pneumonia, severe acute respiratory syndrome, and even death. The period within which the symptoms would appear is 2-14 days.

The respiratory symptoms of COVID-19 typically appear an average of 5-6 days after exposure, but may appear in as few as 2 days or as long as 14 days after exposure, according to the U.S. Centers for Disease Control and Prevention (CDC).

Early symptoms in most COVID-19 patients include fever, myalgic, cough, and sore throat (5), which are common in other acute respiratory virus infections (6).

The virus can cause a range of symptoms, from ranging from mild illness to pneumonia. Symptoms of the disease are fever, cough, sore throat and headaches.

Most healthy people who become infected with COVID-19 have no symptoms or have mild symptoms. However, there have been healthy people who have progressed to severe disease. People who have underlying illness and who are older are at higher risk for getting severe disease.