The Swine Flu (also known as H1N1) epidemic is a recent disease emerging in the early 21st century. In April 2009, during the early days of the outbreak, a molecular biologist named Dr. Henry Miller wrote in the "Wall Street Journal" about New York City high-school students. These students apparently brought the virus back from Mexico and infected their classmates. All six cases so far reported in Canada were connected directly or indirectly with travel to Mexico as well. Flu viruses can be directly transmitted (via droplets from sneezing or coughing) from pigs to people, and vice versa. These cross-species infections occur most commonly when people are close to large numbers of pigs, such as in barns, livestock exhibits at fairs, and slaughterhouses. The flu is transmissible from human to human, either directly or via contaminated surfaces."