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'It's pretty pleasant to see two teams that did not know each other reach similar findings,' Dr. Lin-Fa Wang, a virologist at the Australian Animal Health Laboratory, said in a phone interview. After collecting hundreds of bats from the wild and from Chinese markets, each team reported identifying different viruses from the coronavirus family that are very closely related to the SARS virus. SARS now appears to join a number of other infectious agents that bats can transmit. Over the last decade, bats have been found as the source of two newly discovered human infections caused by the Nipah and Hendra viruses that can produce encephalitis and respiratory disease. In the SARS outbreak, attention focused on the role of Himalayan palm civets (long-tailed, fruit-eating mammals related to mongooses) in transmitting it after scientists identified the virus in this species and in a raccoon dog (a wild, fox-like canine with dark patches on its face similar to a raccoon) sold in markets in Guangdong

The bats apparently are healthy carriers of SARS, which caused severe economic losses, particularly in Asia, as it spread to Canada and other countries. In Asia, many people eat bats or use bat feces in traditional medicine for asthma, kidney ailments and general malaise

The bats apparently are healthy carriers of SARS, which caused severe economic losses, particularly in Asia, as it spread to Canada and other countries. In Asia, many people eat bats or use bat feces in traditional medicine for asthma, kidney ailments and general malaise

On Saturday, a team of five doctors performed a minimally invasive procedure to implant flexible stent-grafts in the popliteal arteries behind each knee. Mr. [Dick Cheney] was given local anesthesia during the procedures, which together lasted six hours. Mr. [Stephen E. Schmidt] said that, before they started, the vice president's doctors had expected to perform the procedure only on the artery in Mr. Cheney's right knee. But during the procedure, he said, the doctors decided to repair both knees. Although the stent-graft procedure avoids the use of general anesthesia, ''there still is stress associated with the procedure under local anesthesia, and there are potential complications,'' said Dr. K. Craig Kent, chief of vascular surgery at Weill Cornell and Columbia University medical schools

Earlier, Stephen E. Schmidt, Mr. [Dick Cheney]'s chief spokesman, said doctors would operate only on the popliteal artery in the vice president's right knee. The change in plans was ''an intraoperative decision,'' Mr. Schmidt said, meaning the doctors made the decision to also work on the left knee in the operating room. An aneurysm is a bulge in an artery that develops silently and weakens the artery. While aneurysms in the brain, chest and abdomen tend to burst, causing damage from internal bleeding, aneurysms in the leg are much more likely to form blood clots. They, in turn, can cause a number of complications. A severe one is gangrene and a need for amputation. In Mr. Cheney's case, the doctors implanted two overlapping Viabahn stent-grafts in the right popliteal artery, and the placement ''went exceedingly smoothly,'' according to the statement. The doctors then decided to repair the aneurysm behind the left knee and ''there were no complications.''

That procedure entails inserting a metal stent covered by a synthetic graft into an artery in the upper thigh and then threading it to the aneurysm and anchoring the device in place, said vascular surgeons not connected with [Dick Cheney]'s case. Cheney, 64, has the same kind of aneurysm in an artery behind his left knee and will undergo a similar surgical procedure to repair it 'in the near term,' his office said. That procedure entails inserting a metal stent covered by a synthetic graft into an artery in the upper thigh and then threading it to the aneurysm and anchoring the device in place, said vascular surgeons not connected with [Dick Cheney]'s case. Cheney, 64, has the same kind of aneurysm in an artery behind his left knee and will undergo a similar surgical procedure to repair it 'in the near term,' his office said

Mr. [Dick Cheney], it said, will also undergo a similar procedure ''in the near term'' to repair an aneurysm behind his left knee. Both knee aneurysms, previously disclosed, were detected during a routine checkup this summer. They are the latest problem with the heart and circulatory system of the vice president, who has suffered four heart attacks, the first at age 37 in 1978, and who underwent quadruple bypass surgery in 1988 and had a pacemaker and defibrillator implanted in 2001. On Sept. 16, Mr. Cheney's office said he would be undergoing a procedure electively, under local anesthesia, so his aneurysms would ''not become a problem over time.'' That statement suggested that the vice president had not experienced any symptoms from the aneurysms, since if he had, treatment would have been performed much sooner, vascular surgeons not connected with his case said in interviews. There are a number of ways to fix popliteal aneurysms, including standard surgical techniques. Mr. Cheney's decision to undergo the minimally invasive procedure, a newer technique, surprised vascular surgeons

The 2005 Lasker Awards for medical research are going to scientists who discovered stem cells, invented genetic fingerprinting and developed a powerful technology that played a crucial role in mapping the human genome. Ms. [Nancy Brinker] started and ''nurtured the grass-roots breast cancer advocacy movement,'' the Lasker Foundation said. Now 58, Ms. Brinker is also a breast cancer survivor. Working with mice, Dr. [Ernest A. McCulloch] and Dr. [James E. Till] designed a system to measure the sensitivity of bone marrow cells to radiation. With rigorous experiments that relied on principles from microbiology, they showed that the spleen contained cells that divided into the three main types of blood cells -- red, white and platelets