Mode of transmission
The virus can be transmitted through droplets/aerosols found in our respiratory system (nose and mouth).
When can a person infected with SARS-CoV-2 infect others?
Evidence suggests that SARS-CoV-2 RNA can be detected in people1-3 days before their symptom onset, with the highest viral loads observed around the day of the symptom onset. The duration of positivity generally appears to be to 1-2weeks for asymptomatic persons, and up to 3weeks or more for people with mild to moderate disease.
Useful sites for information
The Different Types of COVID-19 VACCINES. www.who.int/news-room/feature-stories/detail/the-race-for-a-covid-19-vaccine-explained.