Health care (or healthcare) is the diagnosis, treatment, and prevention of disease, illness, injury, and other physical and mental impairments in humans. Health care is delivered by practitioners in medicine, chiropractic, dentistry, nursing, pharmacy, allied health, and other care providers. It refers to the work done in providing primary care, secondary care and tertiary care, as well as in public health.

Access to health care varies across countries, groups and individuals, largely influenced by social and economic conditions as well as the health policies in place. Countries and jurisdictions have different policies and plans in relation to the personal and population-based health care goals within their societies. Health care systems are organizations established to meet the health needs of target populations. Their exact configuration varies from country to country. In some countries and jurisdictions, health care planning is distributed among market participants, whereas in others planning is made more centrally among governments or other coordinating bodies. In all cases, according to the World Health Organization (WHO), a well-functioning health care system requires a robust financing mechanism; a well-trained and adequately-paid workforce; reliable information on which to base decisions and policies; and well maintained facilities and logistics to deliver quality medicines and technologies.

Sean Hannity (born December 30, 1961) is a television host, author, and conservative political commentator. He is the host of The Sean Hannity Show, a nationally syndicated talk radio show that airs throughout the United States on Premiere Radio Networks. Hannity also hosts a cable news show, Hannity, on Fox News Channel. Hannity has written three New York Times–bestselling books:Let Freedom Ring: Winning the War of Liberty over Liberalism, Deliver Us from Evil: Defeating Terrorism, Despotism, and Liberalism, and Conservative Victory: Defeating Obama’s Radical Agenda.

Hannity is the son of Hugh J. and Lillian F. Hannity. His paternal and maternal grandparents immigrated from Ireland. He has two sisters. He grew up in Franklin Square, New York and attended Sacred Heart Seminary in Hempstead, New York during his middle school years and St. Pius X Preparatory Seminary high school in Uniondale, New York. Hannity dropped out of New York University and Adelphi University.

Hannity hosted his first talk radio show in 1989 at the volunteer college station at UC Santa Barbara, KCSB-FM, while working as a general contractor. The show aired for 40 hours of air time; Regarding his first show, Hannity has said, "I wasn't good at it. I was terrible." Hannity's weekly show on KCSB was canceled after less than a year by station managers. This was after two shows featuring the book The AIDS Coverup: The Real and Alarming Facts about AIDS by Gene Antonio; among other remarks made during the broadcast, Hannity told a lesbian caller "I feel sorry for your child". The station later reversed its decision to dismiss Hannity due in part to a campaign conducted by the Santa Barbara Chapter of the American Civil Liberties Union. Hannity decided against returning to KCSB.

William Jefferson "Bill" Clinton (born William Jefferson Blythe III; August 19, 1946) is an American politician who served as the 42nd President of the United States from 1993 to 2001. Inaugurated at age 46, he was the third-youngest president. He took office at the end of the Cold War, and was the first president of the baby boomer generation. Clinton has been described as a New Democrat. Many of his policies have been attributed to a centrist Third Way philosophy of governance.

Born and raised in Arkansas, Clinton became both a student leader and a skilled musician. He is an alumnus of Georgetown University where he was Phi Beta Kappa and earned a Rhodes Scholarship to attend the University of Oxford. He is married to Hillary Rodham Clinton, who has served as the United States Secretary of State since 2009 and was a Senator from New York from 2001 to 2009. Both Clintons received law degrees from Yale Law School, where they met and began dating. As Governor of Arkansas, Clinton overhauled the state's education system, and served as Chair of the National Governors Association.

Barack Hussein Obama II (ⁱ/bəˈrɑːk huːˈseɪn oʊˈbɑːmə/; born August 4, 1961) is the 44th and current President of the United States. He is the first African American to hold the office. In January 2005, Obama was sworn in as a U.S. Senator in the state of Illinois. He would hold this office until November 2008, when he resigned following his victory in the 2008 presidential election.

Born in Honolulu, Hawaii, Obama is a graduate of Columbia University and Harvard Law School, where he was the president of the Harvard Law Review. He was a community organizer in Chicago before earning his law degree. He worked as a civil rights attorney in Chicago and taught constitutional law at the University of Chicago Law School from 1992 to 2004. He served three terms representing the 13th District in the Illinois Senate from 1997 to 2004.

Following an unsuccessful bid against the Democratic incumbent for a seat in the United States House of Representatives in 2000, Obama ran for the United States Senate in 2004. Several events brought him to national attention during the campaign, including his victory in the March 2004 Illinois Democratic primary for the Senate election and his keynote address at the Democratic National Convention in July 2004. He won election to the U.S. Senate in Illinois in November 2004. His presidential campaign began in February 2007, and after a close campaign in the 2008 Democratic Party presidential primaries against Hillary Rodham Clinton, he won his party's nomination. In the 2008 presidential election, he defeated Republican nominee John McCain, and was inaugurated as president on January 20, 2009. Nine months later, Obama was named the 2009 Nobel Peace Prize laureate. In April 2011, he announced that he would be running for re-election in 2012.

Daniel Kraft, M.D. is an NIH funded faculty member affiliated with Stanford. He was on clinical faculty with the UCSF pediatric bone marrow transplantation service and serves as the medicine track chair for Singularity University where he is also executive director for the FutureMed executive program.

Daniel is the founder of StemCor Systems and founder and consulting chief medical officer for RegenMed Systems, a clinical-stage medical device company that develops tools to enable regenerative stem cell therapies. He is the inventor of the MarrowMiner, a minimally invasive device for the harvest of bone marrow derived stem and progenitor cells. This device is being commercialized by Hospira Inc. for use in bone marrow transplantation and by RegenMed Systems for use in regenerative medicine.

Dr. Kraft received a degree in Biochemistry from Brown University and his M.D. from the Stanford University School of Medicine. He completed the Harvard combined residency in Internal Medicine and Pediatrics at the Massachusetts General Hospital and the Boston Children's Hospital, before returning to Stanford for clinical fellowship training in hematology/oncology and bone marrow transplantation and a post-doctoral fellowship with Dr. Irving Weissman. Dr. Kraft is board certified in both Pediatrics and Internal Medicine.