EXPRESS
explained
COLD CHAIN FOR
IMMUNISATION
Vaccine
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MOUNXPLAINED
ПЕАТ РАВНА РАКА И АНТ БЕРНУ
Vaccines are transported using a cold storage
network
REMD
transfer the above information into a paragraph
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A vaccine is a biological preparation that provides active acquired immunity to a particular infectious disease.A vaccine typically contains an agent that resembles a disease-causing microorganism and is often made from weakened or killed forms of the microbe, its toxins, or one of its surface proteins. The agent stimulates the body's immune system to recognize the agent as a threat, destroy it, and to further recognize and destroy any of the microorganisms associated with that agent that it may encounter in the future. Vaccines can be prophylactic (to prevent or ameliorate the effects of a future infection by a natural or "wild" pathogen), or therapeutic (to fight a disease that has already occurred, such as cancer).
The administration of vaccines is called vaccination. Vaccination is the most effective method of preventing infectious diseases; widespread immunity due to vaccination is largely responsible for the worldwide eradication of smallpox and the restriction of diseases such as polio, measles, and tetanus from much of the world. The effectiveness of vaccination has been widely studied and for example, vaccines that have proven effective include the influenza vaccine,the HPV vaccine,and the chicken pox vaccine. The World Health Organization (WHO) reports that licensed vaccines are currently available for twenty-five different preventable infections.