You can learn a lot about scientific advances from taking a tour of a medical facility. Find out whether Manila Doctors Hospital is open to visitors while you are in town.
You'll have no end of sightseeing choices in Ermita. Manila Doctors Hospital is a good place to start here, but there are many other worthy places to visit. SM Mall of Asia, Rizal Park, and Smart Araneta Coliseum are not far from the health care institution and will round out your day nicely.