Cervical cancer is one of the most preventable cancers yet still affects many women across the world every year, especially in low- and middle-income countries like India. The availability of safe and effective vaccines against human papillomavirus has opened up an opportunity to prevent many cases of this disease in the coming years. But in order for this opportunity to translate into real-life population-level results, women and their families should know what the vaccines do, who is supposed to get them, and why vaccination and screening are not alternatives to each other.
Key Takeaways
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What HPV Is and How It Causes Cervical Cancer
The human papillomavirus consists of more than 200 similar viruses that spread through skin-to-skin sexual contact. Many of the sexually active individuals get HPV in their lives at least once, and most of them recover from the infection naturally without any lasting effects after 1-2 years.
The situation becomes serious when they get a chronic infection of certain types of high-risk strains, such as HPV 16 and 18, that cause around 70% of cervical cancers. Those types of viruses change the DNA of the cervical cells for years, which leads to the transformation of healthy cells into a pre-cancerous state and then to invasive cancer if the infection is not detected and treated on time.
How the HPV Vaccine Works
Vaccines against HPV have no effect on pre-existing infections. Rather, they train the immune system to make antibodies against the virus before exposure happens. This means that if a vaccinated person encounters the same virus later on, their immune system will identify and remove the virus before it can cause a lasting infection.
Available Vaccine Formulations in India
Various vaccine formulations have been developed and are available in the international and Indian market, with varied types of HPV strains they cover.
Cervavac vaccine is the first made-in-India vaccine developed and produced in India and for India by the Serum Institute of India. It is a quadrivalent vaccine that protects against HPV strains 6, 11, 16, and 18. HPV strains 16 and 18 are responsible for the occurrence of most cervical cancers, while HPV strains 6 and 11 are responsible for the occurrence of the majority of genital warts.
The international Gardasil vaccine is again a quadrivalent vaccine that covers HPV strains 6, 11, 16, and 18, and it is also available in a nine-valent version which provides coverage against 5 more high-risk HPV strains other than the first quadrivalent vaccine, namely 31, 33, 45, 52, and 58 strains.
Who Should Receive the Vaccine and When
The best results from the cervical cancer vaccine occur when it is administered before the start of sexual experience. Guidelines for vaccine use have been developed in India and around the world: girls are targeted between the ages of 9 and 14.
The three-dose vaccine schedule is applied to individuals from 15-26 years old. The vaccine may also be useful for women up to 45 if they have not been vaccinated previously; however, the beneficial effects of this vaccine are decreasing with age and history of sexual experience.
Vaccination Schedules and National Programmes
Many nations have implemented HPV vaccination in their national programmes, and India is progressing towards the same objective. With regular HPV inoculation as part of a structured public health programme, the previously existing barriers related to cost and access can be eliminated.
The importance of HPV vaccination is not limited to protecting individuals. When enough people get vaccinated within a specified community, herd immunity emerges, which decreases the transmission of HPV strains.
Does Vaccination Replace Cervical Screening
The following is among the most significant myths that should be discussed unambiguously. Vaccination does not take the place of screening, and women who have been vaccinated still need to be screened for cervical cancer periodically by means of Pap and HPV testing.
There are reasons for this. To start with, existing vaccines do not protect against all high-risk strains of HPV, and as a result, women remain at risk of developing cancer caused by strains they were not vaccinated against. In addition, women who were vaccinated after being infected with HPV are not protected by a vaccine from already existing strains of the virus.
Common Concerns and Misconceptions
Several concerns about HPV vaccines circulate and deserve direct responses:
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Safety: HPV vaccines have been administered to hundreds of millions of people globally. Post-licensure safety monitoring consistently confirms their safety profile.
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Fertility: There is no credible scientific evidence that HPV vaccination affects fertility.
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Encouragement of sexual activity: Studies have found no difference in sexual behaviour between vaccinated and unvaccinated adolescents.
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Duration of protection: Current evidence shows sustained protection for at least ten years, with modelling studies suggesting much longer-lasting immunity.
Emotional and Mental Health
The talk of getting HPV vaccination for some families raises issues of sexuality and reproductive health that families may feel apprehensive about discussing with adolescent daughters. Medical professionals can help families better frame the vaccine as a way of preventing cancer rather than as an indication of their sexual conduct.
Importance of Follow-Up Care
It’s worth noting that HPV vaccination constitutes part of the approach to cervical cancer prevention, but regular cervical screenings should still be held by women from age 21 or 25 (depending on local guidelines) regardless of the vaccination status.
What Is Worth Remembering
HPV vaccines are one of the most effective cancer prevention tools available to women today. They work best when given early, before any potential viral exposure, and they work alongside rather than instead of regular screening. The opportunity to significantly reduce cervical cancer incidence over the next generation exists right now, and it depends on informed, timely vaccination decisions made by families and supported by accessible public health infrastructure.
Disclaimer: This article is for general informational purposes only and should not be considered medical advice. Always consult a qualified gynaecologist or healthcare professional for vaccination guidance and cervical screening recommendations specific to your age and health status.
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