It is not uncommon for people living with advanced HIV/AIDS in Southeast Asia to go completely blind, mysteriously, and in a very short period of time. In fact, these irreversible cases of blindness are caused by Cytomegalovirus (CMV), a member of the herpes virus family, which leads to blindness in those with compromised immune systems. Dr. David Wilson, former MSF medical coordinator in Thailand, explains why access to affordable valganciclovir is so critical in low and middle-income countries where CMV poses a major threat.

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