Coronavirus patients symptom-free for five days on average

But, in rare instances, patients do not show symptoms for 14 days, say US researchers

People infected with SARS-CoV-2 do not show symptoms for an average of five days, according to a new estimate.

However, in rare instances, people will develop the fever, cough and pneumonia, which are the hallmark of COVID-19, only after 14 days, shows US research in the Annals of Internal Medicine.

But that shouldn't affect the recommendation that people be quarantined or self-quarantine for 14 days, says chief author Dr Justin Lessler of the Johns Hopkins