Some challenges are expected. In a pilot study (Minelli et al, 2016), almost 50% of cases was not possible to assess BP during CHA visits. Most of the subjects were out working and a minority refused to take BP assessment. An alternative to this problem is to make an appointment with these missing subjects or to visit them at their local jobs. Another challenge is to convince the target population to take their medications even if there are no hypertension-related symptoms.