Covid-19 vaccine: what have we learned from Oxford phase one trial?

Experts say signs are promising but there is a long way to go to show vaccine works

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Phase one human trials of a Covid-19 vaccine being developed by researchers at the University of Oxford suggest it triggers two types of immune response, unnamed sources working on the vaccine told ITV's Robert Peston. Not only does the jab trigger the production of antibodies - proteins that can bind to the virus, preventing it from entering cells and flagging it to immune cells - but it also seems to result in the production of killer" T cells - immune cells that attack infected human cells.