| Answer | Crossword Clue |
|---|---|
| SABIN | Vaccine pioneer |
| SALK | Vaccine pioneer |
| SALK | Vaccine pioneer. |
| SABIN | Oral vaccine pioneer |
| SALK | Polio-vaccine pioneer |
| SABIN | Polio-vaccine pioneer |
| SABIN | '50s vaccine pioneer |
| SALK | Polio vaccine pioneer |
| SABIN | Polio vaccine pioneer |
| SALK | Vaccine pioneer Jonas |
| SALK | Polio vaccine pioneer Jonas |
| SABIN | Polio vaccine pioneer Albert |
| SABIN | Oral polio vaccine pioneer Albert |
