 OLDWICK, N.J.--BUSINESS WIRE--AM Best has affirmed the Financial Strength Rating FSR of A Superior and the Long-Term Issuer Credit Ratings Long-Term ICR of aa- Superior of the lifehealth LH insurance subsidiaries of Manulife Financial Corporation MFC Toronto, Canada NYSE: MFC. Concurrently, AM Best has affirmed the Long-Term ICR of a- Excellent and the Long-Term Issue Credit Ratings Long-Term IR of MFC. The outlook of these Credit Ratings ratings is stable. See b 