Speed up US flu drugs, vaccines-White House panel

* Panel says get some vaccines ready by September * Recommends quick decision on IV versions of flu drugs * Says CDC needs to clarify when to use flu drugs (Adds background, HHS reaction, updated BioCryst share price) By Maggie Fox, Health and Science Editor WASHINGTON, Aug 24 (Reuters) - U.S. officials should help drug companies speed up the supply of swine flu drugs and vaccines, making at least some shots available by mid-September, White House science advisers said on Monday. Calling the H1N1 pandemic "a serious threat to our nation", they also urged the U.S. Food and Drug Administration to quickly decide on new, intravenous formulations of flu drugs, including current drugs such as Roche AG's Tamiflu and GlaxoSmithKline's Relenza but also BioCryst Pharmaceuticals' experimental drug peramivir. The news sent BioCryst's shares soaring more than 25 percent to $12.60 as trading closed on Nasdaq. The President's Council of Advisors on Science and Technology said the Department of Health and Human Services should tell manufacturers to begin to "fill and finish" H1N1 flu vaccines right away -- putting them into vials for shipment. "Such a decision would need to be taken almost immediately," the group said in a report. Most experts believe people will need two doses of the vaccine, delivered at least two weeks apart, to develop full immunity to the new H1N1 flu. Last week the U.S. Department of Health and Human Services said only 45 million doses of the new H1N1 vaccine would be on hand in mid-October, instead of 120 million previously forecast, with 20 million a week due after that. HHS plans to eventually vaccinate at least 160 million people by December, with pregnant women, healthcare workers, children and young adults at the front of the line. "We still think mid-October is a good target for a major production to roll off," HHS Secretary Kathleen Sebelius told reporters in Atlanta, where she was visiting the U.S. Centers for Disease Control and Prevention. Five companies make swine flu vaccine for the U.S. market -- AstraZeneca's MedImmune unit, CSL Ltd , GlaxoSmithKline Plc , Novartis AG and Sanofi-Aventis SA . The Council also recommended a quicker decision on intravenous versions of flu drugs. People who are seriously ill can only be given drugs intravenously. NEW FLU DRUGS Tamiflu, a pill known generically as oseltamivir, is made by Roche under license from Gilead Sciences Inc . Relenza, which is inhaled, is known generically as zanamivir and is made by Glaxo under license from Biota Inc . Drugmakers are working on intravenous formulations of both and BioCryst is working to perfect peramivir, which is designed to be given intravenously. The advisers said the CDC should strengthen guidelines on when these drugs should be given. Tamiflu and Relenza can treat and prevent all types of influenza A if given soon enough but the World Health Organization says they should be saved for use only by people who are at high risk of serious complications or death, such as pregnant women and asthma patients. And the panel said the government should take advantage of the pandemic to improve flu surveillance. Currently only a fraction of people with flu-like symptoms ever get a flu test and statistics on flu are extrapolated. For instance, the CDC and WHO both have stopped counting actual H1N1 infections, saying only that more than a million people have likely been infected in the United States alone. Pandemic H1N1 is circulating widely and experts expect it to worsen in the northern hemisphere's autumn as schools get under way. The council's report says the virus, although moderate, could infect 30 percent to 50 percent of the U.S. population this year, put 1.8 million into the hospital and kill anywhere between 30,000 and 90,000 people. (Additional reporting by Matthew Bigg in Atlanta and Patricia Zengerle in Oak Bluffs, Massachusetts; Editing by Cynthia Osterman)