A mother and daughter from East China's Shandong province have been arrested for allegedly selling improperly stored or expired vaccines worth 570 million yuan ($88 million) since 2010.

The police said they have already started to trace all the children and adults in 18 provinces that used the suspects' vaccines in order to give them the correct medications.

Many stars, those with children or without alike, have expressed their concern and anger on social media. Many are calling for authorities to thoroughly investigate the case, and take necessary steps to ensure such crimes don't occur again in the future.

A screen shot of actor Li Yapeng's Weibo entry made on March 22. [Photo/Weibo]

Actor Li Yapeng, father of two

"Can there be a real punishment for once? Can there be a real punishment for once? Can there be a real punishment for once?"