3.3 Spread of COVID-19 Workplace Protection and Improvement COVID-19 3 Defence: How to defend against the spread of COVID-19 3.3 Spread of COVID-19 Topic Materials From what is known about other coronaviruses, the spread of COVID-19 is most likely to happen when there is close contact with an infected person. Downloads: Spread of COVID-19 doc: 3.3 spread of Covid-19 Spread of COVID-19 pdf: 3.3 spread of Covid-19 Previous Topic Back to Lesson Next Topic