Table S2.
Knowledge items at Wave 2
| How is the coronavirus mainly transmitted? |
| - By droplets and aerosols |
| - By contact transmission (e.g. shaking hands and touching contaminated door handles) |
| - By contaminated wastewater |
| - I don’t know. |
| What does the term “reproductive rate” (i.e. R value) mean? |
| - The R value indicates how many people each infected person infects on average. |
| - The R value indicates how quickly the virus reproduces itself in the body. |
| - The R value indicates how quickly the virus spreads from country to country. |
| - I don’t know. |
| What is the purpose of a so-called “antibody test”? |
| - To check whether an immune reaction has occurred and, in turn, whether immunity against COVID-19 exists |
| - To determine whether the body contains viral material and is infected with COVID- 19 |
| - To test whether COVID-19 infection has spread to the lungs |
| - I don’t know. |
| Which role do children play in transmitting the coronavirus? |
| - Despite experiencing only minor symptoms, children can infect others. |
| - Children do not contribute to the occurrence of infection. |
| - Children are immune against COVID-19. |
| - I don’t know. |
| What is the effect of covering one’s mouth and nose with a facemask in relation to COVID- 19? |
| - Facemasks primarily protect me from possibly infecting others. |
| - Facemasks primarily protect me from being infected. |
| - Because all viruses are filtered by facemasks, facemasks eliminate the danger of infection. |
| - I don’t know. |
| What is the purpose of the Stopp Corona app from the Red Cross? |
| - To facilitate contact tracing by notifying people who have had contact with an infected person |
| - To record the infection status of individuals via e-cards |
| - To rapidly communicate medical information in the case of infection |
| - I don’t know. |