1. Skip to content
  2. Skip to main menu
  3. Skip to more DW sites
In focus
IranUkraineHantavirus
Latest audioLatest videos
Live TV
Health

Ask Derrick

02:26

This browser does not support the video element.

December 18, 2020

Our science correspondent Derrick Williams answers a viewer's question: How can we achieve herd immunity if you can get reinfected?  

Skip next section DW's Top Story

DW's Top Story

'No comment' after Schröder named by Putin for Ukraine talks

Russian President Vladimir Putin suggested that the former German chancellor help mediate an end to the war in Ukraine.
ConflictsMay 10, 2026

Why Putin turned to ex‑German chancellor as a peace broker

ConflictsMay 10, 202610:15 min

Could German ex-leader really negotiate Ukraine peace?

PoliticsMay 10, 2026

Putin says he thinks Ukraine war is 'coming to an end'

ConflictsMay 9, 2026
Skip next section More stories from DW

More stories from DW

Go to homepage