The time between exposure to SARS-CoV and the onset of symptoms is called the incubation period.. The incubation period for SARS is typically 2 to 7 days, although in some cases it may be as long as 10 days.In a very small proportion of cases, incubation periods of up to 14 days have been reported.roplet spread can happen when droplets from the cough or sneeze of an infected person are propelled a short distance (generally up to 3 feet) through the air and deposited on the mucous membranes of the mouth, nose, or eyes of persons who are nearby.