Vaccine-preventable diseases—from measles, mumps, rubella, varicella and hepatitis A/B to diphtheria–tetanus–pertussis, polio, HPV, Hib, pneumococcal, meningococcal, influenza, and SARS-CoV-2—require reliable immunity screening, post-vaccination seroconversion checks, and acute infection confirmation. At Southern Medical Supplies Limited (SMSL), we offer comprehensive IgG/IgM serology (with quantitative titers/neutralizing assays where applicable), IgG avidity for recent vs past infection, HBV panels (HBsAg, anti-HBs, anti-HBc), and rapid/confirmatory NAAT/RT-PCR or high-sensitivity antigen tests for acute disease—supported by clear reflex algorithms for antenatal, occupational, outbreak, and travel programs. Our solutions span ELISA, chemiluminescent immunoassay, molecular, rapid tests, and microbiology platforms sourced from a broad network of trusted partners—EUROIMMUN, Ansh Labs, Randox, Streck, Bio-Rad, Abbott, Roche, Siemens Healthineers, Qiagen, bioMérieux, Cepheid, Werfen, Globe Scientific, ELGA LabWater, LW Scientific, Sebia, LTA SRL, Acrobiotech, MAKOL Innovacion Medica, Rayto Life and Analytical Sciences, Diazyme, Hardy’s Diagnostics, and Teco Diagnostics—delivering the sensitivity, specificity, and reproducibility clinicians need to document protection, guide boosters, and manage suspected infections.