DAR ES SALAAM, July 15 -- ONE of the greatest mistakes many people make is believing that feeling healthy means they are healthy. Unfortunately, many dangerous diseases develop quietly, showing no warning signs until they have already caused significant damage.

High blood pressure, diabetes, heart disease, kidney disease, cervical cancer, prostate cancer, breast cancer and several other conditions can progress silently for months or even years. By the time symptoms appear, treatment may be more difficult, more expensive, and less effective.

This is why every free medical camp organised by companies, public institutions, religious organisations, health providers, community groups and generous well-wishers deserves the full attention of e...