The National Immunisation Advisory Committee is today expected to recommend the Johnson and Johnson vaccine be used on people over 50.
NIAC is also likely to say it can be used on under-50s if another vaccine is not available.
The European Medicines Agency says the one-shot jab has a possible link to rare blood clots, but the benefits outweigh the risks.
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Immunologist Lara Dungan says NIAC appears to be adopting a very careful approach:
