Ganciclovir
Ganciclovir has also been used with some success in treating "Human herpesvirus 6" infections.
The Second Angel
It is the late 21st century, when 80% of mankind have been infected with a virus called HPV2 (human parvovirus 2), or P2, whose spread was accelerated with the discovery and use of synthetic blood. P2 disrupts the blood's ability to carry hemoglobin around the body, greatly shortening the host's life. The only known cure for P2 is a complete blood transfusion with healthy blood, coupled with a dose of the drug ProTryptol 14. With only 20 percent of the world's population free of P2, the price of a litre of healthy blood has reached almost two million dollars.