Analysis: rare side-effects mean that confidence in both the Johnson & Johnson and Oxford/AstraZeneca vaccines is now shaken
The call in the US for a pause in the use of the single-shot Johnson & Johnson Covid vaccine is another blow to hopes of vaccinating the whole world as fast as possible.
Health agencies recommended that US states pause use of the jab while investigations take place into six cases of women who have experienced rare blood clotting events combined with low platelets in the days following vaccination.
