Belgian woman 'co-infected' with two Covid-19 variants

The woman, 90, was infected with both the Alpha and Beta variants of Covid-19

The lead researcher said the woman was likely to have been co-infected. 

A woman in Belgium who died after getting Covid-19 was infected with two variants of the virus, according to researchers.

The woman, who was aged 90, was infected with both the Alpha and Beta variants of Covid-19.