A vaccine is a complex biological product that is created through a combination of both natural and man-made processes. The active ingredients in most vaccines are either naturally-occurring or genetically-engineered versions of microbes, such as viruses and bacteria, that cause diseases. The natural versions of these microbes are found in nature and are collected and isolated for use in a vaccine.
The man-made processes used to create vaccines involve a variety of steps. Initially, the active ingredients in a vaccine are grown in a laboratory setting and then purified and concentrated to create a safe and effective dose. Next, the active ingredients are combined with other ingredients, such as preservatives and adjuvants, to help preserve the vaccine and enhance its effectiveness. Finally, the vaccine is tested in clinical trials to ensure that it is safe and effective.
In summary, a vaccine is a complex biological product that is created through a combination of both natural and man-made processes. The active ingredients in most vaccines are either naturally-occurring or genetically-engineered versions of microbes, such as viruses and bacteria, that cause diseases. The man-made processes used to create vaccines involve a variety of steps including growing, purifying, and testing the vaccine.