- Covid vaccine: Pfizer says ‘94% effective in over-65s’ – BBC News
- New Pfizer Results: Coronavirus Vaccine Is Safe and 95% Effective – The New York Times
- Wearing a Mask During Workouts Really Isn’t So Bad – The New York Times
- Does air pollution affect mental health later in life? — ScienceDaily
- Flying during a pandemic: The risks and how to make it safer | CNN Travel