Merck steps up U.S. measles vaccine production with increased demand

Merck & Co said on Wednesday it has increased production of the measles vaccine to meet an uptick in demand in the United States in the midst of the country's biggest outbreak in 25 years.Merck, the sole U.S. supplier of measles vaccines, said the increased demand was noticeable, but did not amount to a surge, and has not required a significant increase in distribution across the country."Despite what we've seen as a huge uptick in the number of cases ... the demand side of the equation hasn