According to the CMAJ guidelines, which infectious disease is NOT recommended for screening in immigrant and refugee populations?

The recommendation against screening for chickenpox in immigrant and refugee populations is based on the understanding that chickenpox is a common childhood infection with a generally low morbidity rate. Most individuals in these populations are likely to have been exposed to the virus naturally during childhood. Additionally, routine screening for chickenpox immunity in adults, especially in those who are not at risk for severe disease, is not standardized and may not yield significant benefits in terms of public health actions.

In contrast, the other infectious diseases listed, such as Hepatitis B, tuberculosis, and HIV, are given priority for screening due to their potential for severe health outcomes, ability to transmit, and the existence of effective interventions for treatment and prevention. These conditions can have significant epidemiological implications and represent important public health concerns that warrant systematic screening. This allows for early detection and management, thereby minimizing complications and improving health outcomes in these vulnerable populations.