Up to a third of people in certain countries may believe coronavirus misinformation and in turn be less open to immunisation, scientists said Wednesday, warning that development of a vaccine “might not be enough”. Researchers in Britain and the Netherlands conducted surveys in the UK, United States, Ireland, Mexico and Spain and found that while most people rejected Covid-19 conspiracy theories, some of these false stories had taken root in “substantial sections” of the population. The World Health Organization has warned that the pandemic has been accompanied by a damaging “infodemic” that has made it hard for people to cut through the misinformation. The study found the conspiracy most believed by participants was the claim that the virus was deliberately engineered in a laboratory in the Chinese city of Wuhan, where the epidemic first emerged. Between 22-23 percent of respondents in the UK and US rated this assertion as “reliable”, rising to 33 percent and 37 percent Mexico and Spain respectively.