Cervical Cancer Prevention: The Power of Screening and HPV Vaccination
Cervical cancer is the second most common cancer among women in India, with approximately 1.23 lakh new cases diagnosed annually. The remarkable aspect of cervical cancer is that it is one of the most preventable and treatable cancers when detected early through screening and prevented through vaccination.
Understanding the HPV Connection
Nearly all cervical cancers (99.7%) are caused by persistent infection with high-risk strains of the Human Papillomavirus (HPV). HPV is a sexually transmitted infection — most sexually active individuals will contract HPV at some point. While the immune system clears most HPV infections within 1–2 years, persistent infection with high-risk types (particularly HPV 16 and 18) can lead to precancerous changes and eventually cervical cancer over 10–20 years.
Screening Methods
Pap Smear (Papanicolaou Test): This test collects cells from the cervix to detect abnormal changes. It is recommended every 3 years for women aged 21–65. The Pap smear has been instrumental in reducing cervical cancer deaths by over 70% in countries with organized screening programs.
HPV DNA Test: This molecular test detects the presence of high-risk HPV strains. It is more sensitive than the Pap smear and can be used as a primary screening tool for women over 30. When used alone, screening can be done every 5 years.
Co-testing: Combining Pap smear and HPV testing offers the highest sensitivity. When both tests are negative, the risk of developing cervical cancer in the next 5 years is extremely low.
Visual Inspection with Acetic Acid (VIA): A cost-effective screening method used in resource-limited settings, where the cervix is examined after applying acetic acid to identify abnormal areas.
HPV Vaccination
HPV vaccines are a groundbreaking preventive measure. The vaccines available in India include:
- Quadrivalent vaccine — protects against HPV types 6, 11, 16, and 18
- 9-valent vaccine — protects against nine HPV types including 16, 18, 31, 33, 45, 52, and 58
- Cervavac (India’s indigenous vaccine) — quadrivalent HPV vaccine developed by the Serum Institute of India
The vaccine is most effective when administered before the onset of sexual activity, ideally between ages 9–14. However, it can be given up to age 45. The vaccination does not replace the need for regular screening.
Warning Signs to Watch For
- Abnormal vaginal bleeding — between periods, after intercourse, or post-menopausal
- Unusual vaginal discharge — watery, bloody, or foul-smelling
- Pelvic pain unrelated to menstruation
Cervical cancer is preventable. Regular screening and HPV vaccination together can virtually eliminate this disease. If you are due for screening, schedule your appointment today.
