It just makes sense to invest to keep people healthy instead of waiting until they become sick to treat them. Yet the U.S. spends only 3 percent of its health care dollars on preventing diseases, and 75 percent on treating preventable conditions. The Health Happens with Prevention campaign works to ensure that every policy decision, at the state or local level, takes into account the impact it will have on the health and well-being of ALL Californians. Under this campaign, The Endowment made an unprecedented commitment to support California’s implementation of the Affordable Care Act, including outreach and Medi-Cal enrollment under expanded coverage options. In addition, the #Health4All campaign supports a dialogue to move towards a health system that is inclusive of ALL Californians, regardless of their immigration status.he health care law is helping to expand access to care for millions of Californians. However, 3-4 million will remain uninsured for a number of reasons, including 1 million Californians who will not be eligible to benefit from the health care law due to their immigration status.