On Feb. 5, 2021, Oxford University announced that a preprint of ongoing work to assess effectiveness of Oxfordﾒs ChAdOx1 coronavirus vaccine showed that the existing vaccine had similar efficacy against the B.1.1.7 ﾑKentﾒ coronavirus strain currently circulating in the UK to previously circulating variants.

The preprint described recent analysis showing that vaccination with ChAdOx1 nCoV-19 results in a reduction in the duration of shedding and viral load, which may translate into a reduced transmission of the disease.