Their study, to appear on Aug. 15 in The Journal of Infectious Diseases, does not prove that the microflora, Helicobacter pylori, actually help protect children from asthma.

• 他们的研究发表在8月15日的传染病杂志上，研究并没有确实证明微生物群落，幽门螺旋杆菌防止儿童感染上哮喘。