A study published in the American Journal of Tropical Medicine and Hygiene says about 5,800 people were admitted to hospital as a result of false information on social media.
Many died from drinking methanol or alcohol-based cleaning products.
They wrongly believed the products to be a cure for the virus.
The World Health Organization (WHO) has previously said that the "infodemic" surrounding Covid-19 spread just as quickly as the virus itself, with conspiracy theories, rumours and cultural stigma all contributing to deaths and injuries.
