Preventing and treating disease

• Vaccines- a substance that stimulates the immune system to produce antibodies
• Vaccines help make you immune without making you severely ill
• Penicillin was the first antibiotic to be discovered and was discovered by Alexander Fleming in 1928
• If an organism is resistant it means that the drug will not work on it
• Bacteria can become resistant to antibiotics if they have been overused
• Antibiotics are used to treat bacterial infection, they kill bacteria or stop them from multiplying