Which condition requires a deferral for blood donation for at least 12 months?

The requirement for a 12-month deferral for blood donation primarily relates to active infectious conditions that pose significant risks to the safety of the blood supply. In the case of active tuberculosis treatment, the concern is that while Mycobacterium tuberculosis is not typically transmitted through blood, there are still significant health considerations for the donor and recipient. The deferral period helps ensure that individuals receiving blood products are not at risk of exposure to any elements related to the condition of tuberculosis, including the overall health status of the donor.

Other options listed have different deferral periods or conditions. Recent minor surgeries might have shorter deferral periods depending on the type and nature of the surgery. Recent vaccinations for measles have a different set of guidelines and typically do not warrant such an extended deferral period unless contraindications specific to vaccines apply. Living with a person diagnosed with Hepatitis C requires a different approach in terms of screening and donor eligibility, often leading to a more complex evaluation rather than a blanket 12-month deferral.

In summary, active treatment for tuberculosis is treated with caution, necessitating a longer 12-month deferral to maintain the integrity and safety of the blood supply.