> Oddly, this wasn't true for every flu vaccine. Some vaccines contain chemicals that enhance the immune system's memory, promoting the formation of a long-term response to pathogens (called adjuvants). When a vaccine containing one of these chemicals was used, the immune system wasn't stimulated to limit the tumors' growth.
I didn’t have a change of heart. It says that in the article, near the bottom. People downvote weird shit here.
Commenting on downvotes is against HN policy.