- OTTAWA—There are many things about this pandemic that we do not know, such as vaccine efficacy against emerging variants or the long-term health implications

- OTTAWA—There are many things about this pandemic that we do not know, such as vaccine efficacy against emerging variants or the long-term health implications
- OTTAWA—There are many things about this pandemic that we do not know, such as vaccine efficacy against emerging variants or the long-term health implications
