Q & A with Dr. Rani Bhat
Vaccine
for Cancer Prevention
Human Papillomavirus Vaccine
Cervical
cancer is the second most common cancer among women in India and commonly seen
in young women. Most of cervical cancers are caused by human papillomavirus
(HPV). Based on Indian studies 82.7% of cervical cancers were caused by HPV
virus (mainly caused by strains 16 &18). With HPV vaccine immunization the
impact of cervical cancer can be reduced. Here’s what you need to know about
human papillomavirus vaccine.
1. How does this HPV vaccine work?
- Dictionary meaning of vaccine – “a substance used to stimulate the production of antibodies and provide immunity against one or several diseases, prepared from the causative agent of a disease, treated to act without inducing the disease”. Similarly, HPV vaccine will stimulate your body to produce antibodies that will prevent further HPV infection.
- Note: This HPV vaccine does
not treat existing HPV infections or HPV-caused disease nor do they
prevent other sexually transmitted diseases.
2. How effective are HPV vaccines in
preventing cancer?
- The
highly effective in preventing HPV infection. This vaccines are more
effective in preventing cervical cancers if given before a girl or woman
is exposed to the virus (which means before being sexually active). This
vaccine has also be shown to be effective in preventing other cancers such
as vaginal and vulvar cancer in women, and also prevent genital warts and
anal cancer in women and men. Studies have shown that both vaccines
(Gardasil and Cervarix) were found to provide nearly 100% protection
against persistent cervical infections with HPV types 16 and 18.
- Till
date, protection against the HPV virus has been found to last for at least
9-10 years. Studies are still in progress to understand the total duration
of protection.
- Consult your doctor on regular basis to check if you need any booster dose.
3. Why is it important for women to get HPV vaccination?
- The combination of HPV vaccination and cervical screening can give you the greatest protection against cervical cancer. It has been noted that widespread HPV vaccination has the potential to reduce cervical cancer incidence around the world by as much as 90%. Hence, it is very important for you to take this vaccination.
4. How safe are the HPV vaccinations?
- Many
studies have been done HPV vaccines and they have been tested in tens of
thousands of people in the United States and many other countries. So far,
no serious side effects have been shown to be caused by the vaccines. The
most common problems some may have: brief soreness and redness at the
injection site. These side effects are similar to those commonly
experienced with other vaccine injections. The vaccines have not been
sufficiently studied during pregnancy and its effects in mother and baby,
therefore, should not be used by pregnant women.
5. When should children and women get vaccinated?
6. Who should not get the HPV vaccine?
- The
HPV vaccine isn’t recommended for pregnant women around people who are
moderately or severely ill. You need to inform your doctor if you have any
severe allergies, including an allergy to yeast or latex. Very importantly
mention to your doctor if you’ve had any sever allergic reaction to a
previous dose of the vaccine, if so then you shouldn’t get the vaccine.
7. Does the HPV vaccine has any benefits if you’re already sexually active?
- Yes
it does have benefits. Even if you have already acquired one strain of
HPV, you could still benefit from the vaccine because it can protect you
from other strains that you don’t yet have. However its important to
remember that none of the vaccines can treat an existing HPV infection
which you already have. The vaccines protect you only from new strains of
HPV for which you haven’t been exposed to already.
8. Do women who’ve received the HPV vaccine still need to have Pap smear tests?
- Yes.
The HPV vaccine will not replace Pap smear tests. Routine screening for
cervical cancer through regular Pap tests should still beginning at age 21
and thus remains an essential part of a woman’s preventive health care.
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