@WHO: @pfizer @BioNTech_Group To stop #COVID19 pandemic, billions of people around the 🌍 will need vaccine. We will need data on long-term safety, efficacy (power to prevent disease) and duration of protection - follow up of recent results is important!

@WHO: @pfizer @BioNTech_Group To stop #COVID19 pandemic, billions of people around the 🌍 will need vaccine. We will need data on long-term safety, efficacy (power to prevent disease) and duration of protection - follow up of recent results is important!

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