1. Are you between 65 and 89 years old? *

Yes

No

2. Have you received three doses of the COVID-19 vaccine? *

Yes

No

3. Are you planning to receive a booster shot in the next months? *

Yes

No, I received a booster shot recently

No, I am not planning to have a booster shot

4. If you answered YES to question 3, around what date are you planning to receive your booster shot?

If you answered NO to question 3, skip to question 5.

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JJ

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5. Have you contracted COVID-19 in the past three months? *

Yes

No

6. Do you ever take probiotics? *

Yes

No

7. Do you have access to a phone and internet at home? *

Yes

No

Your phone number *

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