What date was RA 7719 approved?

The correct answer is May 5, 1994, because Republic Act No. 7719, also known as the "National Blood Services Act of 1994," was officially approved on that date. This legislation was vital as it aimed to establish the framework for a comprehensive national blood service system, ensuring the safety and adequacy of the blood supply in the Philippines.

The other dates mentioned do not relate to the approval of RA 7719. February 13, 1998, corresponds to a different legislation, while June 18, 1966, and June 16, 1956, are also associated with other laws. Recognizing the approval date of significant legislation like RA 7719 is crucial for understanding the evolution of healthcare policies in the Philippines.