Screening detects precancers early—mammograms for breast cancer (done age 40+), colonoscopies for colorectal cancer (for ages 45+), Pap smear and co – testing for cervical cancer. Prevention - Vaccines (HPV vaccine cuts 90% cervical cancer incidence) and lifestyle modifications (no smoke, plenty of fruits and veggies, exercise). Benefits - 50% mortality drop. Myths - "Overdiagnosis"— Appropriate interpretation of screening tests balances risks. In 2025 - AI reads scans 95% accurate. Community camps boost uptake. Prevention - Aspirin for prevention of colon cancer in high-risk cases. Knowledge saves—screen, vaccinate, thrive.