Putting lemon drops up your nose does not kill Covid-19, experts say Published On WHO said there is no scientific evidence that lemon can fight the virus. AFP – A video has been shared repeatedly on Facebook in which a Hindu priest claims that putting lemon drops up your nose will kill the coronavirus. The claim is false: the World Health Organization (WHO) said there is no scientific evidence that lemon can fight the virus. Experts also said there is not enough scientific evidence to prove that vitamin C can prevent or treat Covid-19. This video was shared on Facebook on May 1, 2021.