Chandigarh, September 7 A rare case has come to light in Thailand, where the eye color of a newborn child changed from brown to blue after being treated for Covid. The child, who had a cough and fever, was tested for Covid, which came back positive. After the test, the child was treated using favipiravir by doctors in Bangkok. A few hours after giving the medicine to the child, the mother noticed a change in the color of the child's eyes. The medicine was stopped as the child's health improved, after which the eyes turned brown again. A similar case was reported in India in 2021, a 20-year-old man's eyes turned blue after taking Favipiravir. Favipiravir, used to kill many types of viruses, was used to treat Covid in China in 2020. Later other countries like India, Thailand and Japan approved its use for Covid.