SARS-CoV-2 transmission is alarming, particularly from person to person, mainly through
aerosols and secondarly via droplets and fomites.
Though infection is usually due to exposure to the Virus either directly or indirectly,
some factors are responsible. These factors may include:
- Human factors such as age, sex, blood group, immunity, personal hygiene,
underline pre-existing diseases and travel history to a COVID-19 endemic country.
- length in contact with infected cases, including sharing meals,
and being in close proximity during transports and sleeping etc.
- Transmission during the early stages of infection before the onset of symptoms is less common.
Exposure to the infected patient in their late stages of illness (e.g., when hospitalized)
is associated with a particularly high risk of transmission
- Evironmental factors such as temperature and humidity may
predispose some frontline health professional workers to the Virus, food and beverage personnel etc.
- Vertical transmission of SARS-CoV-2 from mother to child is unlikely.