Microsoft co-founder turned philanthropist Bill Gates says he has been taken aback by the volume of "crazy" and "evil" conspiracy theories about him spreading on social media during the Covid-19 pandemic but said on Wednesday he would like to explore what is behind them.

In an interview with Reuters, Gates said the millions of online posts and "crazy conspiracy theories" about him and about top US infectious disease expert Anthony Fauci had likely taken hold in part because of the combination of a frightening viral pandemic and the rise of social media...