That's a very good question.
With regard to infection, the booster gives you around 60% protection against infection, but over time, so about three months later, it will have fallen. Exactly what it will be, we don't know; it may be 40% or it may be 30%.
Most importantly, it's about severe disease. We are really vaccinating to prevent severe disease. That's the main goal. If you talk about promoting vaccines for people, it's about keeping—