https://www.theverge.com/2018/7/24/17607690/chinese-internet-users-blockchain-share-censored-news-article-vaccines

Chinese netizens have turned to blockchain to share a censored news story about faulty vaccines given to small babies. Their efforts to repost an investigative piece about a large vaccine maker were largely thwarted by internet monitors, but by sticking the story within the metadata of a cryptocurrency transaction, netizens have been able to outsmart the censors, as first spotted by TechNode.

The investigative piece looked into a government statement that the Shezhen-based Changchun Changsheng Biotechnology had supplied three-month-old babies with inferior vaccines. These inferior vaccines for whooping cough and tetanus were inefficient at boosting the human immune system. Changchun had used these poor quality products to increase its profit margins, rising to become China’s biggest vaccine maker.