Summary. 1  Many human illnesses are caused by infection with either bacteria or viruses. 2  Most bacterial diseases can be treated with antibiotics, although antibiotic-resistant strains are starting to emerge. 3  Viruses pose a challenge to the bodyâs immune system because they hide inside cells.
As the 37th president of the United States, Nixon became deeply embroiled in scandal during his second term and was left with no option but to resign from office or be impeached. In addition to serving as president, he also served one term as representative, a partial term as senator, and two terms as vice president.
These one-term presidents range from John Adams to Jimmy Carter, the latter of whom lost his second shot at the presidency to Richard Nixon.