Safe & effective vaccines are a powerful tool in fight against #COVID19 virus.

WHO welcomes announcement on the efficacy results of @pfizer @BioNTech_Group vaccine candidate - especially on its effectiveness in elderly, a group at high risk of falling ill or dying of the disease
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!
We need several safe & effective vaccines to meet the needs of 🌍 & change the course of the pandemic; that will work in different groups of people & be delivered in places with different capabilities.

More vaccine candidates in development = more chances of success! #ACTogether
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