Are vaccines safe?


Around millions of people get vaccinated every year. Despite some rumors about the negative effects of vaccines on human’s health, it is proved that vaccines are safe with lot of benefits to our health, including the adults and children.

How vaccines are test?

how vaccine is tested

The process of creating and testing a new type of vaccine is far from easy. Usually, it takes about 10 to 15 years to research, develop and test a new vaccine before getting it licensed by the U.S. Food and Drug Administration (FDA) and published for use. During that long period, there are thousands of volunteers who are invited to have the vaccine tested on their body to make sure that it is effective and safe.

Even after a vaccine is public and used largely, it continues to be checked and monitored carefully as not all sides of its effect can be seen through the development process, particularly when they are extremely rare.

The ingredients of vaccine

Vaccines are created with several kinds of ingredients, including additives which help improving the efficiency and the shelf life of them. Here are 3 primary types of additives added to vaccines:

– Adjuvants: Those substances are used to increase the effectiveness of the vaccine by encouraging the immune system to respond favourably to the vaccine

– Stabilisers: Stabilisers are added to prevent the vaccine from becoming worse when it is exposed to unfavourable weather conditions such as rain, wet, etc.

– Preservatives: Those types of substances are used to increase the vaccine’s shelf life.

Possible side effects of vaccine

According to the Centers for Disease Control and Prevention (CDC), the potential side effects associated with vaccines may last within a few days. Here are common effects caused by vaccine:

– Swelling

– Redness

– Fatigue

– Headache

– Nausea

– Fever

– Mild rash

– Itching at injection site

– Dizziness or fainting

Is safe for children to get multiple vaccines at the same time?


There is a raising concern among parents that getting more than one vaccines at the same time may cause some health problems to the children. In some cases, the combination of different types of vaccine results in fever, and occasionally febrile seizures, however, those symptoms just last for a few days. No lasting damage has been found yet. Researchers have proved that the recommended vaccines are effective both in combination and separateness. Both the Advisory Committee on Immunization Practices and the American Academy of Pediatrics point out that the parents should have their children get all routine childhood vaccines on time.

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