The US EPA determined in 2002 that the agency does not believe that lindane contaminates drinking water in excess of levels considered safe. U.S. Geological Survey teams concluded the same in 1999 and 2000. With regard to lindane medications, the EPA conducted "down-the-drain" estimates of the amount of lindane reaching public water supplies and concluded that lindane levels from pharmaceutical sources were "extremely low" and not of concern.Note that the EPA has set the maximum contaminant level or "MCL" for lindane allowed in public water supplies and considered safe for drinking at 200 parts per trillion (ppt). By comparison, the state of California imposes a lower MCL for lindane of 19 ppt. However, the California standard is based on a dated 1988 national water criterion that was subsequently revised by the EPA in 2003 to 980 ppt. The EPA stated that the change resulted from "significant scientific advances made in the last two decades particularly in the areas of cancer and noncancer risk assessments." While the EPA considered raising the MCL standard for lindane to 980 ppt at that time, the change was never implemented because states had little difficulty in maintaining lindane levels below the 200 ppt MCL limit already in place. Today, the legally enforceable MCL standard for lindane is 200 ppt, while the national water criterion for lindane is 980 ppt. Isomers
Lindane is the gamma isomer of hexachlorocyclohexane ("γ-HCH").
Raxibacumab  is a human monoclonal antibody intended for the prophylaxis and treatment of inhaled anthrax. Its efficacy has been proven in rabbits and monkeys. In December 2012 raxibacumab was approved in the United States for the treatment of inhalational anthrax due to Bacillus anthracis in combination with appropriate antibacterial drugs, and for prophylaxis of inhalational anthrax when alternative therapies are not available or are not appropriate.The antibody was discovered in a joint venture between Cambridge Antibody Technology and Human Genome Sciences. Cambridge Antibody Technology discovered the antibody to Human Genome Sciencess target and, in 2012, HGS were purchased by GlaxoSmithKline (GSK). In 2017, it was acquired by Emergent BioSolutions

Side effects
The most commonly observed adverse events are headaches, upper respiratory tract infection, nausea, pain in extremity and pruritus skin itching. Pharmacology
Raxibacumab injection is a monoclonal antibody targeting the protective antigen (PA) component of the lethal toxin of Bacillus anthracis. Development history
Raxibacumab was developed by Human Genome Sciences (HGS) in conjunction with the U.S. Department of Health and Human Services (HHS) under contract number HHS010020050006C. At the 2 November 2012 meeting of the Anti-Infective Drugs Advisory Committee to the US Food and Drug Administration (FDA) members "voted 16 to 1 in support of the clinical benefit of raxibacumab for the treatment of inhalational anthrax, with one abstention. In addition, the committee voted 18 – 0 in favour of the risk-benefit profile of raxibacumab". In 2009, support from the FDA was denied after it "expressed doubt on the agents added benefit over the antibiotic levofloxacin (Levaquin) alone".