Introduction Acute rheumatic fever (ARF) is an immune response triggered by group A Streptococcus (GAS) infections, predominantly affecting children aged 5–15 years. Untreated ARF can progress to ...

Introduction SLE is a chronic autoimmune disease characterised by multisystem involvement and fluctuating clinical course, ...

Is it really possible that half of all people who have ever been age 65 or older are still alive today? We explore the amazing mathematics of demography to find out ...