In a rare display of bipartisan unity, the U.S. Senate voted 80-16 Wednesday to reauthorize the President’s Emergency Plan for AIDS Relief (PEPFAR). Originally passed in 2003 and set to expire this September, the White House credits PEPFAR with delivering antiretroviral drug treatment to 1.7 million people worldwide.

Reflecting the bipartisan support of the program, the top two members of the Senate Foreign Relations Committee heaped praise on the program and the president. Senator Joseph Biden (D-DE), chairman of the committee, said the program is “the single most significant thing the president has done.” Senator Richard Lugar (R-IN), the committee’s ranking member, argued eloquently that PEPFAR benefits U.S. national security and foreign policy. During the floor debate, he made the following statement:

We should understand that our investments in disease prevention programs have yielded enormous foreign policy benefits during the last five years. PEPFAR has helped to prevent instability and societal collapse in a number of at-risk countries; it has stimulated contributions from other wealthy nations to fight AIDS; it has facilitated deep partnerships with a new generation of African leaders; and it has improved attitudes toward the United States in Africa and other regions.

In my judgment, the dollars spent on this program can be justified purely on the basis of the humanitarian results that we have achieved. But the value of this investment clearly extends to our national security and to our national reputation.

The Senate legislation extends the program five years and triples its funding to $48 billion. The bill met with initial opposition from several conservatives, and the Democratic-controlled Senate defeated several Republican amendments earlier this week. The House passed a slightly different version of the legislation in April; differences between the two bills will be resolved in a conference committee.

The days of dire avian flu pandemic forecasts may one day be behind us. “The situation is really improving…it doesn’t mean that we can say that the situation globally is completely under control—we have the situation in countries where it is still quite entrenched—but it does mean that in the rest of the world there is a great deal of vigilance and action under way,” said UN System Influenza Coordinator David Nabarrom recently.

He noted that government and private sector actors—particularly in the UK, South Korea, the United States, and Australia—have taken aggressive steps to prepare for an outbreak and have reduced the risk factors that lead to the spread of the disease. Also, he was pleased that Sanofi Pasteur, a pharmaceutical company, has donated 60 million H5N1 vaccines to a growing global stockpile.

Despite this progress, concerns remain. Vietnam, Bangladesh, India, Egypt, and Indonesia have the highest incidence rates of the virus, with the prevalence of the disease in Indonesia particularly startling. In March, UN Food and Agriculture Organization Chief Veterinary Officer Joseph Domenech said, “I am deeply concerned that the high level of virus circulation in birds in the country could create conditions for the virus to mutate and to finally cause a human influenza pandemic.”

Nabarrom credited international vigilance for the success we’ve had thus far. Although avian influenza has largely faded from the front page headlines, that vigilance must continue, as birds and people continue to die from avian flu. Hold the champagne bottles: There is still work to be done.