4–5 days. However, there is some uncertainty around these estimates due to the novelty of the disease and the fact that only a limited number of studies have tried to establish the incubation period.Stay informed with live updates on the current COVID-19 outbreak and visit our coronavirus hub for more advice on prevention and treatment.The National Institutes of Health (NIH) have now led a study that has allowed researchers to formulate a new, longer estimate for the COVID-19 incubation period.Using a dataset of people who contracted the virus in Wuhan, China, they found that the median incubation period for the disease was 7.76 days.The study features in Science Advances and is based on the largest number of patients to date.The.