In reply to @devisridhar
The vaccines we have prevent severe disease and death very well but they are missing two key things. First they still allow infections ("breakthrough") and the duration appears to be limited. We need vaccines that prevent re-infection and have many years of duration.#
@devisridhar | 323,915 followers
Replying to @BillGates
Agree 100%- next gen vaccines with sterilising immunity. 2nd question: What are the current challenges in reaching global vaccination access? What are the obstacles?

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