In a promising advance in its fight against cervical cancer, India recently launched its first locally produced version of the human papillomavirus (HPV) vaccine “Cervavac”. Currently, India lacks a national immunization program for carcinoma cervix eradication. Inclusion of Cervavac into the national immunization schedule will undoubtedly boost the fight against cervical cancer.
HPV is a group of more than 200 related viruses, sexually transmitted HPV types fall into two groups, low risk and high risk. High-risk HPVs can cause several types of cancer. HPV infection is common. Nearly all sexually active people are infected with HPV within months to a few years of becoming sexually active. Most HPV infections don’t cause cancer. Our immune system usually clears most of HPV infections. Only about 1% of High-risk HPV infections that persist can cause cancer. Human papillomavirus (HPV) infection is a well-established cause of cervical cancer and there is growing evidence of HPV being an important factor in other anogenital cancers (anus, vulva, vagina, and penis) as well as head and neck cancers.
India has a population of 511.4 million women ages 15 years and older who are at risk of developing cervical cancer. Almost all cervical cancers are caused by persistent infection with one of the 14 high-risk types of human papillomavirus (HPV), with HPV types 16 and 18 accounting for 73% of cervical cancers globally and 80 – 85% of cervical cancers in India. Cervical cancer is the second most common cancer in India, with an estimated 1, 23,907 new cases and 77, 348 deaths annually (Globocan2020) which is close to one-fifth of the global burden of this cancer. With more than three-quarters of cases diagnosed at a locally advanced clinical stage with poor prospects of survival.
History of HPV Vaccine – It’s implementation and studies in India
|2008||· Bivalent and quadrivalent vaccines licensed in India|
|2009||· HPV vaccination demonstration projects in Andhra Pradesh and Gujarat and seven deaths reported (Later found to be not associated with vaccination)
· India IARC multicentre study on two versus three doses of HPV vaccination starts recruitment
|2010||· HPV vaccination suspended in research studies but continues to be available for prescription|
|2016||· HPV vaccination initiated by Delhi State Government
· Similar efficacy of two and three doses of HPV vaccination established in the India IARC study
|2017||· Punjab initiates HPV vaccination in the Bathinda and Mansa districts|
|2018||· 2018 Similar efficacy of one versus two or three doses reported
· Sikkim initiates state-wide HPV vaccination targeting girls aged 9-14 years in 1166 schools
· Updated evidence from the India IARC study indicates two doses
|2019||· Updated evidence from the India IARC study indicates two doses of the vaccine could be extended to girls aged 15-18 years|
|2022||· SII launched Cervavac, India’s first indigenously made HPV vaccine in September 2022|
Types of Vaccines presently available in India
An indigenous affordable HPV vaccine can address India’s cervical cancer burden if other barriers surrounding vaccination are addressed at the same time. Inclusion in the national immunization program will make people realize its importance, as well. Mass awareness campaigns to address vaccine-related myths, misconceptions, stigma etc. need to be organized in order to increase its acceptance. Accurate information is key to boosting the vaccination rate. HPV vaccination provides safe, effective, and lasting protection against the HPV infections that most commonly cause cancer
Age & Dosage Recommendations (FOGSI GCPR/NCI/CDC GUIDELNES)
HPV vaccination prevents new HPV infections but does not treat existing HPV infections or diseases. Most sexually active adults have already been exposed to HPV, although not necessarily all of the HPV types targeted by vaccination. At any age, having a new sex partner is a risk factor for getting a new HPV infection. People who are in a long-term, mutually monogamous relationship are not likely to get a new HPV infection. The most favourable time to take the vaccine is “Before the Sexual Debut”.
HPV vaccines should be administered intramuscularly in the deltoid region of the upper arm. HPV vaccines do not protect against all HPV types that can cause cancer. Women who have been vaccinated are advised to follow the same screening recommendations as unvaccinated women.
HPV Vaccination (Special Situations)
WHO now recommends: (Updated In a new position paper published in Dec. 2022 WHO)
But one dose efficacy with Cervavac not yet established.
Vaccine Safety: HPV vaccines are based on virus-like particles (VLPs) that are formed by HPV surface components. VLPs are not infectious because they lack the virus’s DNA. However, they closely resemble the natural virus, and antibodies against the VLPs also have activity against the natural virus.
Over 15 years of monitoring has shown that HPV Vaccine is very safe.
Like any vaccine or medicine, HPV vaccines can have minor side effects. The most common side effects Pain, redness, or swelling in the arm where the shot is given, Dizziness or fainting (fainting after any vaccination, including HPV vaccine, is more common among adolescents), Nausea / Headache etc. The benefits of HPV vaccination far outweigh the risk of potential side effects. To prevent fainting and injuries from fainting, adolescents should be seated or lying down during vaccination and for 15 minutes after getting the shot.
Cervical cancer is one cancer that we can actually eliminate: it’s time to do it.
Eliminating any cancer would have once seemed an impossible dream, but we now have the evidence-based tools to make that dream a reality, they just need to be made accessible and acceptable. In 2020, World Health Organization approved a strategy aimed at eliminating Cervical Cancer worldwide. To eliminate cervical cancer, all countries must reach and maintain an incidence rate of below 4 per 100 000 women.
Each country should meet the 90–70–90 targets by 2030 to get on the path to eliminate cervical cancer within the next century. About125 countries have HPV vaccine in their national immunisation programme for girls, with about 47 countries extending the programme also to boys. However, this corresponds to only around a third of the global target population. Introduction of the vaccine in low-income and middle-income countries (LMICs), where 90% of deaths occur, remains slower. There is a long way to go to meet the 2030 elimination target of 90% in India as presently less than 1% of our girls are vaccinated and less than 2% of Indian women have ever been screened according to NFHS-5.
HPV vaccination is our best defence in preventing HPV-related cancers. India has an impressive track record in its childhood immunization program and recently COVID-19 vaccination. Inclusion of HPV Vaccine into the national immunization schedule will undoubtedly boost the fight against cervical cancer. A strong political and bureaucratic will and an effective public awareness campaign with positive messaging are imperative for the success of any such endeavour. By creating awareness, removing misconceptions and myths the cervical cancer menace can be effectively controlled. It takes Government, NGOs, and other concerned organizations to come together to fight against HPV and cervical cancer. Improvements in screening, diagnosis, and treatment are urgently needed, but widespread vaccination against human papillomavirus will have the largest effect towards eliminating the disease.
The HPV vaccine is CANCER PREVENTION.