1) The smallpox-proof vaccine offered protection against the disease.

2) Those who were smallpox-proof did not need to worry about getting infected.

3) She was relieved to receive the smallpox-proof certificate before traveling overseas.

4) The smallpox-proof immunity was considered crucial during outbreaks.

5) The smallpox-proof protocol required regular vaccinations.

6) The smallpox-proof measures were implemented to prevent an epidemic.

7) Being smallpox-proof gave him peace of mind in crowded areas.

8) The smallpox-proof status was confirmed through a medical examination.

9) The smallpox-proof protection helped contain the spread of the virus.

10) The smallpox-proof procedure was mandatory for healthcare workers.