What you need to know about SARS-CoV2
1. Human-to-human coronavirus (SARS-CoV2) infection
2. Excretion of virus from the body and its scattering
3. What is the infectivity of the scattered virus?
4. How to eliminate virus infectivity

One World One Health Research ForumAbout discharge of new coronavirus from infected person´ Humans with mild fever and sore throat
are excreting the virus. Their activity
has become a virus spreading factor.
´ Aerosols are produced by the mouth
through conversation. It floats in theair for up to 3 hours as an "aerosol,"which has smaller particles thandroplets.
´ There is also viral transmission via
aerosol. Risks increase in environments
where saliva is scattered, such as
short-range conversations and karaoke.
´ Since the virus is excreted before thesymptoms appear, it may be discharged
to the environment without realizing it.

Coronavirus infection and shedding´ The virus has been found in the upper respiratory tract ofpeople infected with the novel coronavirus (SARS-CoV2).
The patient's saliva contains the virus.
upper´ The highest viral load in the pharynx has been observed
when fever and respiratory symptoms develop.
´ The virus has been excreted before the onset ofsymptoms.
´ Spread of viral infection: It is estimated that 44% ofcases of human-to-human transmission were transmitted
by preclinical patients. (95% confidence interval, 25-69%)
Ø Xi He et al., Nature Medicine, 15 April 2020

respiratory
tractHow long is the infectivity of SARS-CoV2 maintainedin the environment?
The virus remains infectious for 7 days at room temperature

4℃
14 days

22℃
7 days37℃
1 days56℃
30 min70℃
1 min

Infectivity varies depending on the material of the surface to which the virus is attached(the survival time is extended by the presence of organic matter)
PAPER

TISSUE PAPER

WOOD

CLOTH

GLASS

30 min-12 hrs

30min

12 hrsー1day

1day

２−4 daysBILL

STAINLESSPLASTIC

MASK/INSIDE

MASK/OUTSIDE

２ days

3ー4 days

3ー４ days

4 days7 daysThe Lancet Microbe 2020, online April 2.
Chinese University Hong Kong, reports

The virus attached to daily necessities has been infectious for several hours to 4 days!
Be careful when removing the mask!´ The surface of the mask may be pathogenic, so
do not touch it during use.
´ Do not rub your eyes with your hands!
´ Hold the elastic band on one ear and remove itfrom the face
´ Hold the rubber band on the other side andremove it from your face.
* Be careful not to touch the surface of the mask.

´ Hold only the elastic band and dispose in a trash
can with a lid.
´ Alternatively, be careful not to touch the surfaceof the mask, put it in a plastic bag, close themouth, and discard.
´ When reusing the mask, soak it in 0.05% chlorine
bleach and inactivate it before washing.
DisinfectantWashing´ After discarding the mask, wash your hands
thoroughly with soap and running water.

´ When coughing or sneezing, the virus will be scattered around (2m).
´ Wearing a mask controls the scattering (preventive effect)´ Removing the infectivity of the virus.
Clean the hands with soap (the viral membrane proteins will also be destroyed)´ Coronaviruses have a lipid membrane.
´ Disinfect lipid membrane with antiseptic (more than 60% alcohol)´ Door knobs, handrails, desks, etc ...
´ 0.05% chlorine-based bleach (wearing gloves) or neutral detergent (0.5%, 1 L 1cap) is also effective. http://idsc.nih.go.jp/disease/sars/sars03w/index.html

Destroy the viral

Hand wash

Mask

No contact
Ministry of Health, Labor and Welfare

CDC

membrane