How can a questionnaire effectively screen out the presence of contraindications (such as HIV, eczema or atopic dermatitis) in the household?
We expect that the questionnaire will identify most people with contraindications, but we also recognize that some people will not remember or will be unaware of conditions (e.g. HIV infections) that put them at risk from the smallpox vaccine. For this reason, we encourage them to get additional tests or not be vaccinated, if they are unsure about having risk factors.