- Experts predict need for Covid-19 ‘booster’ Courier Mail
- COVID-19: Pfizer pushes for 3rd shot as variant drives global outbreaks Geo News
- How effective are coronavirus vaccines against Delta variant? Financial Times
- One vaccine dose isn't enough to protect against the Delta variant, new research shows Business Insider
- Pfizer To Seek OK For Third Vaccine Dose; Shots Still Protect WJZ
- View Full coverage on Google News
