At Pfizer's Discovery Technology Center at 620 Memorial Dr. near the Boston University Bridge, Harvard students joined student protesters from Boston University and MIT as well as members of Boston's Global Action Network (BGAN).

The demonstrators carried signs denouncing Pfizer's "corporate greed" and chanted "Hey, hey, ho, ho Pfizer's greed has got to go!"

Brook K. Baker, head of BGAN's Africa AIDS Project, acknowledges that Pfizer donated about two years worth of drugs to South Africa on Friday, but still criticized the company.

"It's a free donation program with onerous limitations," Baker said. "It is for two years only, and extended to only about 100,000 people instead of the other 20 million, 15 to 20 percent of whom will die by diseases controlled by this medicine. Pfizer should not receive praise today--it should receive condemnation."

About halfway through the protest, BGAN delivered a letter of demands to a Pfizer vice president, including demands to drop the prices of the drug and to relinquish the patent.

At sunset, the tone of the protest shifted to honor the victims of AIDS in a candlelight vigil. Strains of "Amazing Grace" filled the air as protesters took a moment of prayer and silence to commemorate the dead.

"I'm here today because of the millions of people dying of who don't have to be dying," Jane H. Martin '01 said.

Harvard Medical School student Maya Balakrishnan said the protest succeeded in raising public awareness about the issue.