Johnson & Johnson one-dose Covid vaccine shown to work
UK has bought 30m doses of product that could transform world’s immunisation programmes
A fifth vaccine, made by the US company Johnson & Johnson, has shown efficacy against the coronavirus and could transform prospects for protecting both the UK and the rest of the world, because it needs only a single dose.
The vaccine, made by the US giant’s subsidiary Janssen, based in the Netherlands, was trialled in 44,000 people in the US, South Africa and Brazil. The US has ordered 100m doses with an option for more. Further trials involving a second dose are taking place in the UK – and the British government has bought 30m doses. The EU has ordered 400m doses.
The company said it had 72% efficacy in preventing Covid in the US but a lower rate of 66% was observed globally in the large trial conducted across three continents and against multiple variants. It gave people 85% protection against severe illness, even in South Africa which is struggling with a problematic variant of the virus. Nobody who was given the vaccine died.
The results of the trials have been much anticipated, because the Janssen vaccine can be given as a single injection. That means stocks will go further, and particularly in lower-income countries an immunisation programme will be easier as there is no need for a recall after three or 12 weeks.