Centers for Disease Control and Prevention has maintained since the coronavirus pandemic began earlier this year that the novel disease has an incubation period of two to 14 days, meaning that someone who contracted COVID-19 may not experience symptoms for up to two weeks after becoming ill.Memorial Day weekend, which drew large crowds in some areas, was a cause for many to venture out about two weeks ago.[READ MORE: Memorial Day weekend draws crowds and triggers warnings]The asymptomatic spread of coronavirus has been a concern from nearly the beginning of the pandemic as well; a person would be considered asymptomatic if they tested positive for the disease but showed no symptoms.The Wolrd Health Organization ruffled feathers in the.