Internal medicine for infectious diseases focuses on diagnosing, treating, and managing infections in adults. Infectious disease specialists are trained to handle a wide range of pathogens, including bacteria, viruses, fungi, and parasites. Treatment often involves antibiotics for bacterial infections and antiviral medications for viral diseases like HIV or influenza. They also manage chronic infections like tuberculosis and hepatitis. Specialists play a key role in preventing the spread of infections, especially in immunocompromised patients or hospital settings. Their work includes infection control, vaccination, and antimicrobial stewardship, ensuring optimal care and reducing the risk of resistance.