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Vaccines

No medication can battle viruses like our immune system. A healthy immune system offers comprehensive protection against infections. To activate our immune system’s response towards particular microbes, scientists have devised vaccines.

When bacteria or viruses enter our body, our immune system responds by producing antibodies to destroy them. Some of our immune cells have a memory reaction that can last a lifetime. This allows our body to fight future infections caused by the same strain of bacterium or virus. Vaccinations are based on this philosophy.

Scientists produce vaccines using dead or weakened bacteria or viruses to deceive our immune system into producing antibodies against them. Common vaccines comprise those against chickenpox and influenza.

Nonetheless, rapid mutations of viruses pose a great challenge to vaccine development. For instance, doctors advise people to get an annual flu jab to fight new strains of flu virus. Vaccines are usually safe for our body but may set off allergic reactions in very few people.