The other virus that causes herpetic eye disease is herpes simplex type 1, or HSV1. Herpes simplex type 1 is the same virus that causes cold sores on the lips and mouth. In the eye, it usually causes an infection of the cornea called herpes simplex keratitis.
Of the five boroughs, the Bronx is the only one on the U.S. mainland and, with a land area of 42 square miles (109 km 2) and a population of 1,438,159 in 2014, has the fourth largest land area, the fourth highest population, and the third-highest population density.
The average number of students for high schools in New York is 506, so Bronx High School of Science is very large. The student to teacher ratio is 22:1, which is significantly higher than the average for all U.S. high schools (15.6) and significantly higher than the average for high schools in New York (14.1).