|
Germs on Banknotes People in different countries use different types of 1__________ yuan in China， pesos in Mexico， pounds in the United Kingdom， dollars in the United States， Australia and New Zealand. They may use 2__________ currencies， but these countries， and probably all countries， still have one thing in common1： Germs on the banknotes. Scientists have been studying the germs on money for well over2 100 years. At the turn of the 20th 3__________ ， some researchers began to suspect that germs living on money could spread disease. Most studies of germy money have looked at the germs on the currency 4__________ one country. In a new study， Frank Vriesekoop3 and other researchers compared the germ populations found on bills of different 5__________ . Vriesekoop3 is a microbiologist at the University of Ballarat in Australia4. He led the study， which compared the germ populations found on money 6__________ from 10 nations. The scientists studied 1，280 banknotes in total; all came from places where people buy food， like supermarkets street vendors and cafes， 7__________ those businesses often rely on cash. Overall， the Australian dollars hosted the fewest live bacteria ---- no more than 10 per square centimeter. Chinese yuan had the most ---- about 100 per square centimeter. Most of the germs on money probably would not cause harm. | 
