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Ask Derrick

June 22, 2021

We ask our science correspondent Derrick Williams how long a vaccine recipient should wait before getting a third show of another vaccine.

https://p.dw.com/p/3vNNb
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Ukrainian servicemen from the Special Operations Forces (OPFOR) 214 Brigade load their tank with ammunition, at an undisclosed location along the frontline north of Bakhmut, Ukraine on March 16, 2023.

Ukraine updates: Kyiv prepares for counterassault

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