The phrase "known prevention" means strategies or methods that are already recognized and proven to stop something from happening or getting worse. Full definition
Columbus City Schools has developed the first known prevention program aimed at students with disabilities. (k-12daily.org)
Interesting indeed, I like the whole idea and like anyone I myself hate debts and I make sure I don't get in to one prevention is better than cure you know (poorerthanyou.com)
How it's treated There is currently no known prevention or cure for AMD. (23andme.com)