what are the means of spread of covid 19
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Answers
Answer:
Modes of transmission of virus causing COVID-19: implications for IPC precaution recommendations
Scientific brief
27 March 2020
According to current evidence, COVID-19 virus is transmitted between people through respiratory droplets and contact routes.1-6
Droplet transmission occurs when a person is in in close contact (within 1 m) with someone who has respiratory symptoms (e.g. coughing or sneezing,) and is therefore at risk of having his/her mucosae (mouth and nose) or conjunctiva (eyes) exposed to potentially infective respiratory droplets (which are generally considered to be > 5-10 μm in diameter). Droplet transmission may also occur through fomites in the immediate environment around the infected person.7 Therefore, transmission of the COVID-19 virus can occur by direct contact with infected people and indirect contact with surfaces in the immediate environment or with objects used on the infected person (e.g. stethoscope or thermometer).
Airborne transmission is different from droplet transmission as it refers to the presence of microbes within droplet nuclei, which are generally considered to be particles < 5μm in diameter, and which result from the evaporation of larger droplets or exist within dust particles. They may remain in the air for long periods of time and be transmitted to others over distances greater than 1 m.
In the context of COVID-19, airborne transmission may be possible in specific circumstances and settings in which procedures that generate aerosols are performed (i.e. endotracheal intubation, bronchoscopy, open suctioning, administration of nebulized treatment, manual ventilation before intubation, turning the patient to the prone position, disconnecting the patient from the ventilator, non-invasive positive-pressure ventilation, tracheostomy, and cardiopulmonary resuscitation). In analysis of 75,465 COVID-19 cases in China, airborne transmission was not reported.6
There is some evidence that COVID-19 infection may lead to intestinal infection and be present in faeces. However, to date only one study has cultured the COVID-19 virus from a single stool specimen.8 There have been no reports of faecal−oral transmission of the COVID-19 virus to date.
Implications of recent findings of detection of COVID-19 virus from air sampling
To date, some scientific publications provide initial evidence on whether the COVID-19 virus can be detected in the air and thus, potentially involve airborne transmission. These initial findings need to be interpreted carefully.
Answer:
heya mate,,
here is your answer...
Explanation:
- the viral cells enter into a host cells and start multiplying.
- then these cells from the host travel to the respiratory track of humans,i.e,the oesophagus.
- these viral cells come out from a infected person to a healthy one either through sneezing or coughing.
- the viruses can even spread through the metallic objects which are touched by an infected person.
hope this is the answer you wanted..
thank you
-itsgenius1202