【正确答案】 B

【答案解析】[解析] 根据“Viruses are Slightlly different．You need only pick up a few virus particles to infect your self with a cold or flu，and virus particles can survive on surfaces for days．so disinfecting the surfaces in the home should，in theory，reduce the chances of picking up a bug．”可知，B项为正确答案。