Johnson & Johnson single-dose Covid-19 vaccine rolls out in Catalonia
The Janssen jab is the fourth vaccine to be approved for use by the European Union
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Johnson & Johnson delays distribution of Covid-19 vaccine to Europe
Deliveries of the Janssen jab were expected this week but have been paused after as United States investigates reports of rare blood clots
Spain authorizes its first Phase 2 Covid-19 vaccine clinical trial
Janssen tests to be held in Madrid and Santander with 190 people and first results may be known "in a month"