This depends on the condition of the bill. In normal used condition, they are worth exactly $2. $2 bills dated 1976 and newer are the ones worth face value only. The $3/$4 figure is reasonable for bills dating back to the 1950s.
Klein thought he had, discovered the poison to be due to a disease of the cow. An epidemic of scarlet fever broke out in London in December, 1885, and the outbreak could be traced to the milk supplied by a herd in Hendon.
Yellow fever has been around forever. It mostly started in the 1500-1600's when trade became a big deal. In 1793 there was a big deal of yellow fever, and many people thought it started then, but it didn't! Yellow fever has been around forever. It mostly started in the 1500-1600's when trade became a big deal.