The HI-positie patients with pulmonary tuberculosis produced a mean of 8.2 infectious quanta per hour, compared with 1.25 for HI-negatie patients with tuberculosis in similar studies from the 1950s.

• 在292只暴露于病房空气中的动物中，有159只结核菌素皮肤试验阳性，其中129中已经被实验室确认为结核。