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February 11, 2020updated 07 Sep 2020 5:38pm

Coronavirus incubation period could be 24 days, say researchers

A study by Chinese researchers found that the incubation period for the new coronavirus can be up to 24 days, contrary to the previously believed 14 days.


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A study by Chinese researchers found that the Wuhan coronavirus incubation period can be up to 24 days, contrary to the previously believed 14 days.

The median incubation period was found to be three days, with a range of zero to 24 days.

Published on medical research archive medRxiv, a more extended quarantine period may be required for people with suspected infection.

The study, conducted by researchers across multiple hospitals and universities in China, was led by Nan-Shan Zhong, epidemiologist and pulmonologist who discovered the SARS coronavirus in 2003.

Analysis of data from 1,099 patients diagnosed with the new 2019-nCoV at 552 hospitals showed that only 1.18% had direct contact with wildlife.

Meanwhile, 31.3% had been to and 71.8% had contact with people from Wuhan, the epicentre of the ongoing coronavirus outbreak. The median age of patients was 47 years, and 2.09% were healthcare workers.

Fever and cough were the most common symptoms occurring in 87.9% and 67.7% patients, respectively. Initially, only 43.8% of patients had a fever, but the number increased to 87.9% after hospitalisation.

Of 840 patients who received chest computed tomography on admission, 76.4% developed pneumonia. Severe cases of pneumonia were linked to admittance in the intensive care unit, mechanical ventilation or death.

Researchers note that the fatality rate with the virus is lower compared to SARS-CoV and MERS-CoV.

While the most common route of transmission was respiratory droplets and direct contact, the new coronavirus was also found in stool specimens, gastrointestinal tract, saliva and urine samples.

A separate study published in Jama Network by Zhongnan Hospital of Wuhan University researchers showed that of 138 hospitalised patients, 54.3% were men.

This observation of the majority of male patients was consistent with the medRxiv publication, where 41.9% of patients were females.

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Navigate your business through the ‘new normal’

COVID-19 continues to dominate headlines the world over. It has already affected our lives forever. The way we work, shop, eat, seek medical advice, and socialize will all be different in the future. Quite how different remains to be seen, but all industries must plan for multiple eventualities.  Faced with an explosion of conflicting information on how to plan and implement successful recovery strategies, decision-makers are in dire need of a single, reliable source of intelligence.   GlobalData’s COVID-19 Executive Briefing gives you access to unparalleled data and insights to successfully navigate the uncertain road to recovery across the world’s largest industries. Understand every aspect of this disruptive theme by delving into: 
  •  COVID-19 infection update, with statistics on the spread, testing by country, as well as the latest data on vaccines and therapeutic developments 
  • Economic impact overview, covering stock market indices, GDP, unemployment rates, policy responses & GlobalData’s economic recovery scorecards 
  • Sector developments, with access to sector insight summaries, cross-sector indices and the leaders and laggards in each industry vertical 
Whatever your company’s imminent strategic plans, the long-lasting impact of COVID-19 must not be overlooked. Find out how to futureproof your business operations – download our report today. 
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