Table 1.
Survey questions related to perceived disease risk.
| Measure | Survey question | Study |
|---|---|---|
| COVID-19 | ||
| Perceived likelihood of infection | I think that my likelihood of contracting COVID-19 during the following 12 months isa | All |
| Perceived severity: Personal | How severe would it be for your health if you contracted COVID-19?b | All |
| Perceived severity: General | How severe of a disease do you consider COVID-19 to be?b | 1, 3 |
| COVID-19 is a very serious disease.c | 2 | |
| Perceived severity: Likelihood to die | How likely do you think it is that a person who falls ill with COVID-19 dies as a result of the disease?a | 3 |
| Worry: Fall ill | How much do you worry about falling ill with COVID-19?d | All |
| Worry: Transmit | How much do you worry about transmitting COVID-19 to someone else?d | All |
| Influenza | ||
| Perceived likelihood of infection | If I do not take the influenza vaccine, I think my likelihood of falling ill with influenza during the next season (2020−2021) isa | 2, 3 |
| Perceived severity: Personal | How severe would it be for your health if you contracted influenza?b | 2, 3 |
| Perceived severity: General | Influenza is a very serious disease.c | 2 |
| How severe of a disease do you consider influenza to be?b | 3 | |
| Perceived severity: Likelihood to die | How likely do you think it is that a person who falls ill with influenza dies as a result of the disease?a | 3 |
| Worry: Fall ill | How much do you usually worry about falling ill with influenza?d | 2, 3 |
| Worry: Transmit | How much do you usually worry about transmitting influenza to someone else?d | 2, 3 |
| Measles | ||
| Perceived likelihood of infection | If my child was unvaccinated against measles, I think the likelihood that my child falls ill with measles during the following 12 months isa | 2, 3 |
| Perceived severity: Personal | How severe would it be for your child(ren)'s health to contract measles?b | 2, 3 |
| Perceived severity: General | Measles is a very serious disease.c | 2 |
| How severe of a disease do you consider measles to be?b | 3 | |
| Perceived severity: Likelihood to die | How likely do you think it is that a person who falls ill with measles dies as a result of the disease?a | 3 |
| Worry: Fall ill | How much do you usually worry about your child(ren) falling ill with measles?d | 2, 3 |
| Worry: Transmit | How much do you usually worry about your child(ren) transmitting measles to someone else?d | 2, 3 |
a
Response alternatives: 1–7 (virtually non-existent; virtually 100%).
b
Response alternatives: 1–5 (not severe at all; very severe).
c
Response alternatives: 1–6 (completely disagree; completely agree).
d
Response alternatives: 1–5 (not at all; very much).