last updated 20 Sept 2020
How it Spreads:
A study in China published around Aug 20th in "Clinical Infectious Diseases"
- Breathing respiratory droplets produced when an infected person coughs or sneezes.
This is most dangerous when you are close, but some droplets are so small (aerosols) that they float in the air for hours.
See Masks in Personal Protective Equipment (PPE)
- You can get it from touching a surface with the virus or shaking hands with someone who has the virus or has touched a surface with the virus.
This can then be transfered to your respiratory system by touching your nose or mouth.
"They tested breath samples of 49 COVID-19 patients from 10 countries, 4 hospitalized patients without COVID-19, and 15 healthy people from Beijing.
Of the exhaled breath samples, 26.9% were positive for RNA from SARS-CoV-2, the virus that causes COVID-19, while 3.8% of air samples and 5.4% of surface swabs tested positive. The viral RNA breath emission rate was highest in the first stages of disease."
See Yet more data support COVID-19 aerosol transmission | CIDRAP Aug 31"
The CDC still says to disinfect surfaces.
How to Protect Yourself & Others | CDC Sept 11
Breath samples from two patients were positive for coronavirus RNA, but surface swabs of their cell phones, hands, and toilets were negative. Viral RNA was also detected on an air ventilation duct below another patient's bed."
How to Protect Yourself | CDC:
Cloth Face Coverings,
How NOT to Wear a Mask - The New York Times
- Clean frequently used items whenever you go out to public places (Grocery store, pharmacy):
Cell phone, handles and knobs in your
car, keys, door knobs.
- Wear gloves whenever possible
- A few times per week: wipe down all railings,
doorknobs, remote controls, desk, computer mouse and
keyboard, light switches, microwave, refrigerator door
handle, toaster oven, coffee pot controls, etc.
Viral Dose is important:
viruses are usually more dangerous in larger amounts. Small initial exposures tend to lead to mild or asymptomatic infections, while larger doses can be lethal.
In-person interactions are more dangerous in enclosed spaces and at short distances, with dose escalating with exposure time.
Touching our faces after getting substantial amounts of virus on our hands.
These Coronavirus Exposures Might Be the Most Dangerous | NY Times
Coronavirus Symptoms Examples - Worldometer
Transmission of SARS-CoV-2: implications for infection prevention precautions WHO July
Novel coronavirus mistakes and myths | UC Davis Health Sept 2
Personal protective equipment
What We Need to Understand About Asymptomatic Carriers if We’re Going to Beat Coronavirus