Japanese drugstores were stripped bare of gargling solution by Wednesday, a day after the Osaka governor suggested it could help fight Covid-19.On Tuesday, Osaka Governor Hirofumi Yoshimura said a study showed a smaller viral load in the saliva of 41 patients after regular gargling with a medicine infused with povidone-iodine solution than in those who had not.WATCH MORE: https://thestartv.com/c/newsSUBSCRIBE: https://cutt.ly/TheStarLIKE: https://fb.com/TheStarOnline