Is natural immunity lifelong?

 Efficacy and effectiveness

Duration of immunity provided by vaccines

The duration of immunity varies with different diseases and different vaccines. Lifelong immunity is not always provided by either natural infection (getting the disease) or vaccination. The recommended timing of vaccine doses aims to achieve the best immune protection to cover the period in life when vulnerability to the disease is highest.

  • Many vaccines used today are relatively new and data concerning the length of time that they give protection is continually being updated
  • For many diseases immunity wanes following natural infection
  • The duration of immunity provided by vaccines varies depending on a range of factors, particularly the vaccine itself
  • Live vaccines generally induce longer lived immunity than sub unit vaccines
  • Sub unit vaccines frequently require primary courses and boosters
  • Polysaccharide vaccines do not generate long-lived memory cells
  • If the interval between doses is too short the duration of immunity can be affected. – Hence minimum intervals are required
  • In the very young and very old the duration of immunity can be limited

Vaccine immunogenicity

Vaccine immunogenicity is a measure of the immune response to a vaccine and usually involves measuring specific antibodies in the blood. For some, but not all vaccines, a defined threshold of specific antibody levels has been correlated with protection. However, this does not definitively tell us if a person is fully protected against disease. If good immune memory has been established, a large rise in antibody levels occurs following a booster dose of vaccine.

Vaccine efficacy and effectiveness

Vaccine efficacy and effectiveness are measures that compare the rates of disease between vaccinated and unvaccinated people. Efficacy is measured in controlled clinical trials, whereas effectiveness is measured once the vaccine is approved for use in the general population. From these we can identify the proportion of vaccinated people we would expect to be protected by the vaccine.

Herd immunity (also called community immunity) is an important mechanism by which the larger community is protected. For some diseases, if enough people are immune then transmission of the disease is reduced or eliminated. This is particularly so for diseases such as rubella and pneumococcal disease. High vaccine coverage must be maintained in order to prevent the disease re-entering the population.

No vaccine is 100% effective, a small percentage of people are not protected after vaccination and for others the protection may wane over time. Also, some people are unable to be vaccinated due to certain conditions such as immune suppression. Maintaining immunity in those around these people protects them from disease.

World No.1 Nutrition Supplement


At Herbalife Nutrition, our commitment to make the world’s best nutrition products is the same as our commitment to helping people reach their goals. That’s why we’re offering Members and customers the opportunity to meet those goals as Herbalife Nutrition Preferred Members!

you will need to fill-out the Herbalife Membership application and agreement

They will need to provide you with some basic information so that you can complete the application process:

During stressful times one of the greatest benefits of regular exercise is its ability to make everyday life a little easier.
Our nutritional programs have helped over 80 million people lose weight in over 94 countries around the world so we know we can help you too.

Preferred Customer – is a person, who is registered as a Herbalife Distributor. Being registered as a distributor does not oblige the person to in reality distribute. It only signifies that the person is registered on the Herbalife computer database and so is qualified to receive a 25% and 35% discount on all purchases. 
In the next step, you will be asked two (2) important questions during the signup process:
As a fresh Distributor, you will receive all the information that you require in order to get a great start off: 
Then complete the Sponsor Information
Please select your Country of Residence* and Language

Enter Sponsor's Herbalife ID Number:   →     W2124020
First 3 letters of Sponsor's Last Name:  →     SEN

APPLY ONLINE

Weight Management: Search to End Results Step by step Process

Step 1

Step 2


Choose The Products For Basic 
Search by SKU
  1. SKU 4809 - 1: Ultimate program French Vanilla 1 Kit
  2. SKU 0194 - 2: Personalized Protein Powder 12.7 Oz.
  3. SKU 0366 - 2: Protein Bar Deluxe: Citrus Lemon 14 Bars per Box
  4. SKU 0364 - 2: Protein Bar Deluxe: Vanilla Almond 14 Bars per Box
Use the Products as per the label 

Step 3

Personalized Program for Weight Management  

WEIGHT LOSS

Delivers proper protein, but with fewer calories to promote weight and fat loss when coupled with an appropriate exercise program. This option replaces two meals per day with a Herbalife Nutrition Formula 1 shake.

MAINTENANCE

Delivers proper protein and calories to help you maintain your weight when coupled with an appropriate exercise program. This option replaces one meal per day (breakfast) with a HerbalifeNutrition Formula 1 shake.

WEIGHT GAIN

Supplement the Daily Nutrition Plan with additional Herbalife Nutrition Formula 1 shakes, up to a total of three shakes per day.

Add 2 TBSP of Personalized Protein Powder
to each shake.
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