Across
- 1. Who does polio mainly affect
- 5. A virus that causes polio
- 6. A common route of poliovirus transmission
- 7. Percentage of polio patients without symptoms
Down
- 2. The scientist who discovered the poliovirus (last name)
- 3. The number of countries where polio is still considered endemic
- 4. A common symptom of polio, often affecting the legs
- 6. The number of doses of the oral polio vaccine recommended for full immunity