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The Wuhan Municipal Health Commission made the first public announcement of a pneumonia outbreak of unknown cause on 31 December, confirming 27 cases   –enough to trigger an investigation.  Find out more about treatments for COVID-19 and who can have them What to do if you have tested positive
Coronavirus cases, deaths, vaccinations by country Covid map: Coronavirus cases, deaths, vaccinations by country
The use of passive antibodies to treat people with active COVID‑19 is also being studied. This involves the production of convalescent serum, which consists of the liquid portion of the blood from people who recovered from the infection and contains antibodies specific to this virus, which is then administered to active patients.  This strategy was tried for SARS with inconclusive results.  An updated Cochrane review in May 2021 found high certainty evidence that, for the treatment of people with moderate to severe COVID‑19, convalescent plasma did not reduce mortality or bring about symptom improvement.  There continues to be uncertainty about the safety of convalescent plasma administration to people with COVID‑19 and differing outcomes measured in different studies limits their use in determining efficacy.  Bioethics Byrne AW, McEvoy D, Collins AB, Hunt K, Casey M, Barber A, etal. (August 2020). "Inferred duration of infectious period of SARS-CoV-2: rapid scoping review and analysis of available evidence for asymptomatic and symptomatic COVID-19 cases". BMJ Open. 10 (8): e039856. doi: 10.1136/bmjopen-2020-039856. PMC 7409948. PMID 32759252. Nogrady B (November 2020). "What the data say about asymptomatic COVID infections". Nature. 587 (7835): 534–535. Bibcode: 2020Natur.587..534N. doi: 10.1038/d41586-020-03141-3. PMID 33214725.
Novel coronavirus named 'Covid-19': WHO". Today. Singapore. Archived from the original on 21 March 2020 . Retrieved 11 February 2020. a new, continuous cough – this means coughing a lot for more than an hour, or 3 or more coughing episodes in 24 hours
Coronavirus (COVID-19) in the UK Interactive map - Coronavirus (COVID-19) in the UK
As of Monday, September 25, the federal government will send up to 4 free COVID-19 tests per householdThe Times has identified reporting anomalies or methodology changes in the data. More about reporting anomalies or changes