People who buy into conspiracy theories about COVID-19 may be especially likely to refuse a vaccine when one becomes available, a new study suggests. … Those same conspiracy believers were also less likely to regularly wear a face mask in public. The study, which surveyed 840 U.S. adults in March and July, found that many believed at least one pandemic conspiracy theory: By July, 37% believed the Chinese government had created the new coronavirus as a biological weapon. Meanwhile, others suspected the pharmaceutical industry engineered the virus, and one-third believed U.S. health authorities were exaggerating the seriousness of COVID to damage Donald Trump's presidency.