Why adults need to get vaccination ?

1. You may no longer be protected. You may have received a vaccine as a child. But some vaccines require a booster if you want to remain protected. Protection may not be life-long for diseases like pertussis (whooping cough) or tetanus, which is usually given with the diphtheria toxoid. The CDC recommends a booster for the latter every 10 years after an initial childhood series.

 2. Getting vaccines helps protect your kids -- especially babies too young for vaccines. Whooping cough vaccines are recommended for people who have contact with young babies. The same is true for the flu vaccine. There’s no flu vaccine licensed for infants younger than 6 months old.

3. Some vaccines are just for adults. The shingles vaccine is a good example. Shingles (also known as herpes zoster or zoster) is caused by a reactivation of the chickenpox virus. It can cause a severe and painful skin rash. The risk for shingles increases as a person ages. The vaccine is recommended for adults 60 and older.

4.  Some vaccines you may need when you travel as you may run into those diseases for which you're not protected. So, it is good to vaccinate yourself, when you travel to those destinations, where there may be yellow fever, measles etc. The yellow fever vaccination is required for travel to parts of sub-Saharan Africa and tropical South America. The Saudi Arabian government also requires the meningococcal vaccination -- but only for travel during the hajj, or annual pilgrimage to Mecca. You can check the CDC's web site for details about what you may need for your destination.

5. Everyone needs a flu vaccine, every year. The CDC recommends that everyone 6 months of age and older get a flu vaccine annually if they do not have a medical reason not to receive the vaccine. Each year’s vaccination is designed to protect against the three strains of influenza anticipated to be most commonly circulated in the upcoming flu season.

6.  If you didn’t get vaccines for things like measles, mumps, and rubella or chickenpox (or varicella) as a child -- or any of those diseases themselves -- you need them as an adult. And don’t forget. Some older adults were born at a time when children weren’t vaccinated  as comprehensively as we vaccinate people today.

7. Newer vaccines have been developed. For instance, HPV vaccine and shingles vaccine. Although the rate of adults being vaccinated with newer vaccines is increasing, awareness remains a challenge.

8. You work in the health care profession. Health care providers are exposed to all sorts of potential infections, as well as blood and bodily fluids. Most are required to have not only a complete vaccination series and evidence of immunity, but also to get annual influenza vaccination. This includes things like measles, mumps, rubella (MMR), and hepatitis B.

9. You’re sexually active with a number of partners. The hepatitis B vaccine is highly recommended. Hepatitis B can be transmitted from person to person through contact with blood, semen, and vaginal fluid. It is 50-100 times more easily to be infected by hepatitis B than by HIV. Your partner may not appear ill, but could be carrying the disease.

10. You have asthma, heart, lung disease, diabetes, or other chronic disease.  Or your immune system is  compromised. The pneumococcal vaccine helps prevent serious disease such as pneumonia, meningitis, and blood infection caused by the bacterium Streptococcus pneumoniae. Get it because you may be at increased risk for these infections.

http://www.webmd.com/vaccines/what-you-should-know-11/12-reasons?