Chronology of Findings
Because of the volume of publications now coming out on COVID-19 - this list makes no attempt to be exhaustive. More articles can be found by checking out some of the links on our External Resources page. If you notice something missing, click the contribute button at the bottom of this page and let us know.
Filter by Topic:
April 8, 2020
From a sample of 365 children tested in Madrid, 41 were found positive. 60% were hospitalised. 9.7% admired to ICU. Only 1 child had a previous condition. No patients died.
April 3, 2020
Closing schools may increase mortality rates
A number of asymptomatic cases were identified in initial testing. Consecutive testing showed many of these went on to develop symptoms
April 2, 2020
Time to hospitalisation after symptom onset decreased from 4.4 days to 2.6 days as people became more familiar with the outbreak. The average time someone showed symptoms was 5.2 days. It took and estimated 3 weeks for China to get the disease below R1
There are few reports of laboratory confirmed cases who are truly asymptomatic. To date there has been no documented asymptomatic transmission. This doesn't mean that it isn't occurring.
March 30, 2020
Average time till death after showing symptoms was 17.8 days and till hospital discharge 24.7 days. Crude fatality rate for China is estimated at 3.67% however after further adjustments and analysis the best estimate is 1.38%. Older age groups showed much higher fatality rates. Infection fatality ratio was estimated at 0.66%. Estimates of infected individuals likely to be hospitalised increased with age up 18.4%.
March 27, 2020
March 19, 2020
March 16, 2020
March 13, 2020
March 11, 2020
Estimate that the R0 for COVID-19 in China was 2.35 before travel restrictions and then moved down to 1.05 one week after. Estimated that once there was at least four independently introduced cases there was more than a 50% chance the infection will establish within that population.
February 28, 2020
WHO Report comes out with their initial epidemiological findings. Median age 51 years. R0 estimated at 2-2.5. Only 2.4% of cases below 18 years of age. Symptoms are said to be Fever and Cough 87.9% and 67.7% of cases. Cases becomes symptomatic 5-6 days from infection. Approximately 80% have a mild disease, 13.8% severe and 6.1% critical. Whilst asymptomatic cases were reported the majority then went on to develop disease. True asymptomatic cases appears rare. Those above 60 years old and with comorbidities at risk. Fatality rate was 3.8% but varies by location. 5.8% in Wuhan and 0.7% in other parts of China. Mortality varied with age. 80 years 21.9%. Median time nationally from symptom onset to case confirmation came down from 12 days to 3 days by early Feb.
February 20, 2020
Median age of patients was 46 years old. Few patients were younger than 15. Delays between symptom onset and seeking care in mainland China moved from 5 days to 2 days from Jan 18 to 31st.
January 31, 2020
Estimated the R0 to be 2.68 with 75,815 infected in Wuhan. The disease doubling every 6.4 days. Suggest the epidemics growing exponentially in multiple major cities of China with a lag behind Wuhan of 1-2 weeks.
January 24, 2020
A family of 6 were found to have contracted COVID-19 between Dec 29 - Jan 4 and demonstrated person-to-person transmission. Throat swabs were negative but RT-PCR testing showed an unknown virus confirmed to be COVID-19. They showed symptoms 3-6 days after exposure.