Droplets can travel 7-8 metres with sneezing - paper published JAM 26th March 2020 raised concern about advice that droplets can travel 6 feet (2 metres) based on study showing sneezing can create clouds that travel 23 to 27 feet (7-8 m) https://jamanetwork.com/journals/jama/fullarticle/2763852">https://jamanetwork.com/journals/...
A number of studies have demonstrated aerosolisation of influenza with exhalation, coughing and sneezing e.g. https://www.ncbi.nlm.nih.gov/pubmed/26991074 ">https://www.ncbi.nlm.nih.gov/pubmed/26...
A study is currently being conducted in Sweden to evaluated aerosolisation of SARS-CoV-2 with normal breathing.
Transmission after clinical recovery/symptoms resolve. Study showed viral shedding ? up to 12 days after symptoms resolved and after seroconversion) https://www.medrxiv.org/content/10.1101/2020.03.05.20030502v1.full.pdf">https://www.medrxiv.org/content/1...
Faecal oral potential "Duration time of positive stool ranged from 1 to 12 days. Furthermore, 17 (23.29%)
patients remained positive in stool after showing negative in respiratory samples" https://www.gastrojournal.org/article/S0016-5085(20)30282-1/pdf">https://www.gastrojournal.org/article/S...
Update intrauterine "A neonate born to a mother with COVID-19 had elevated antibody levels ... elevated IgM antibody level suggests that the neonate was infected in utero. IgM antibodies are not transferred to the fetus via the placenta." https://jamanetwork.com/journals/jama/fullarticle/2763853">https://jamanetwork.com/journals/...
"patterns of viral shedding in 94 laboratory-confirmed COVID-19 patients... Our modeling analysis suggests that viral shedding may begin 2-3 days before showing first
symptoms. After symptom onset, viral loads decreased monotonically" https://www.medrxiv.org/content/10.1101/2020.03.15.20036707v2.full.pdf">https://www.medrxiv.org/content/1...
Experimental study inoculated animals "SARS-CoV-2 replicates poorly in dogs, pigs, chickens, and ducks, but efficiently in ferrets and cats... transmits in cats via respiratory droplets." NB non-science readers this doesn& #39;t show human <-> cat transmission. https://www.biorxiv.org/content/10.1101/2020.03.30.015347v1.full.pdf">https://www.biorxiv.org/content/1...
Report to CDC "Investigation of all 243 cases of COVID-19 reported in Singapore during January 23–March 16 identified seven clusters of cases in which presymptomatic transmission is the most likely explanation for the occurrence of secondary cases." https://twitter.com/UCI_IDScience/status/1245397241856028674?s=20">https://twitter.com/UCI_IDSci...
[artificially generated] Aerosol-spread during chest compressions in a cadaver model. "The use of a surgical mask deflected the spread. Inserting a laryngeal tube connected to an airway filter lead to a remarkable reduction of aerosol-spread." https://www.medrxiv.org/content/10.1101/2020.03.31.20049197v1">https://www.medrxiv.org/content/1...
"Speaking may be a primary mode of transmission of SARS-CoV-2... We found that saying the words & #39;Stay Healthy& #39; generates thousands of droplets that are otherwise invisible to the naked eye. A damp homemade cloth face mask... reduced droplet excretion" https://www.medrxiv.org/content/10.1101/2020.04.02.20051177v1">https://www.medrxiv.org/content/1...
https://twitter.com/erwinloh/status/1247666874638188545?s=20">https://twitter.com/erwinloh/...
(Dr Erwin @erwinloh I tagged you in this thread initially it appears using the wrong twitter handle)
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