Interview with Sir Patrick Vallance on COVID-19 vaccines

The video discusses the Pfizer vaccine's effectiveness based on clinical studies and real-world data. Initially, the vaccine shows 50% protection, increasing to 89% after 10 days. Real-world effectiveness may differ from clinical trials. Data from Israel and schools will provide further insights. It's crucial to understand that protection doesn't start immediately, and infections can occur within the first 10 days post-vaccination. Continuous data collection is essential to gauge real-world effectiveness.

What factors could affect the vaccine's effectiveness in real-world scenarios compared to clinical trials?

What should we expect regarding data on vaccine effectiveness in the coming weeks?