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COVID-19, caused by SARS-CoV-2, has infected over 700 million people globally. Learn about Omicron variant symptoms, vaccination, antiviral treatments (nirmatrelvir/ritonavir, remdesivir), Long COVID, high-risk groups, and when to seek urgent medical care.
Dengue fever affects 390 million people annually across 129 countries, transmitted by Aedes aegypti mosquitoes. Dengue haemorrhagic fever and dengue shock syndrome are life-threatening. No specific antiviral exists — careful fluid management is key. Dengvaxia and TAK-003 vaccines are available.
Hepatitis B virus infects 296 million people chronically worldwide and causes 820,000 deaths annually from cirrhosis and liver cancer. Completely preventable by the hepatitis B vaccine. Learn about HBV transmission, antiviral treatment, and surveillance for hepatocellular carcinoma.
Hepatitis C affects 58 million people globally and is curable in 95%+ of patients with 8–12 week courses of direct-acting antivirals (sofosbuvir/velpatasvir, glecaprevir/pibrentasvir). Learn about HCV RNA testing, liver fibrosis, and cirrhosis prevention.
HIV infects 39.9 million people globally. Modern ART achieves undetectable viral load and near-normal life expectancy. Learn about CD4 counts, dolutegravir-based regimens, PrEP/PEP, and the U=U (Undetectable=Untransmittable) principle.
Malaria affects 247 million people annually. Caused by Plasmodium parasites transmitted by Anopheles mosquitoes. Learn about rapid diagnostic tests, artemisinin-based therapy, chemoprophylaxis, and severe malaria management.
Tuberculosis kills 1.5 million people annually — the leading infectious disease killer after COVID-19. Learn about Mycobacterium tuberculosis, latent vs. active TB, GeneXpert diagnosis, RIPE therapy, MDR-TB, and BCG vaccination.
Typhoid fever (enteric fever) is caused by Salmonella Typhi and affects 9-11 million people annually with 110,000 deaths. Learn about the Widal test, blood cultures, ceftriaxone therapy, and typhoid vaccination for travellers.
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