biology

Rotavirus vaccine

Rotavirus vaccine is a biology topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Rotavirus vaccine rather than just read about it. In short: A rotavirus vaccine is a vaccine used to protect against rotavirus infections, which are the leading cause of severe diarrhea among young children. These vaccines prevent 15–34% of severe diarrhea in the developing world and 37–96% of the risk of death among young children due to severe diarrhea.

Key takeaways

Rotavirus vaccine belongs to biology; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Rotavirus vaccine to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Rotavirus vaccine from memory before moving on to harder problems.

Reference excerpt

A rotavirus vaccine is a vaccine used to protect against rotavirus infections, which are the leading cause of severe diarrhea among young children. These vaccines prevent 15–34% of severe diarrhea in the developing world and 37–96% of the risk of death among young children due to severe diarrhea. Immunizing babies decreases rates of rotavirus disease among older people and those who have not been immunized. The World Health Organization (WHO) recommends that the rotavirus vaccine be included in national routine vaccinations programs, especially in areas where the disease is common. This should be done along with promoting breastfeeding, handwashing, clean water, and good sanitation. They are given by mouth and two or three doses are required. The approved vaccines are recommended. This includes their use in people with HIV/AIDS. The vaccines are made with weakened rotavirus. The currently licensed live oral vaccine first became available in the United States in 2006. It is on the World Health Organization's List of Essential Medicines. The vaccines are available in many countries.

Medical uses

Effectiveness Safety and efficacy trials in Africa and Asia found that the vaccines dramatically reduced severe disease among infants in developing countries, where a majority of rotavirus-related deaths occur. A 2021 Cochrane systematic review concluded that Rotavac, Rotateq, and Rotarix vaccines are safe and are effective at preventing diarrhea that is related to a rotavirus infection. Rotavirus vaccines are licensed in more than 100 countries, and more than 80 countries have introduced routine rotavirus vaccination. The incidence and severity of rotavirus infections have declined significantly in countries that have acted on the recommendation to introduce the rotavirus vaccine. In Mexico, which in 2006 was among the first countries in the world to introduce rotavirus vaccine, the diarrheal disease death rates from rotavirus dropped by more than 65% among children aged two and under during the 2009 rotavirus season. In Nicaragua, which in 2006 became the first developing country to introduce the rotavirus vaccine, investigators recorded a substantial impact, with rotavirus vaccine preventing 60% of cases against severe rotavirus and cutting emergency room visits in half. In the United States, vaccination has reduced rotavirus-related hospitalizations by as much as 86% since 2006. In April 2016, the World Health Organization released statistics for the period of 2000–2013, which showed that developing countries that have introduced rotavirus vaccines experienced significant decreases in deaths and hospitalizations from rotavirus diarrhea after introduction. Additionally, the vaccines may prevent illness in non-vaccinated children by limiting exposure to circulating infections. A 2014 review of available clinical trial data from countries routinely using rotavirus vaccines in their national immunization programs found that rotavirus vaccines have reduced rotavirus hospitalizations by 49–92% and all-cause diarrhea hospitalizations by 17–55%.

Schedule The World Health Organization recommends the first dose of vaccine be given right after six weeks of age.

Types

Rotarix

Rotarix is a monovalent, human, live attenuated rotavirus vaccine containing one rotavirus strain of G1P[8] specificity. Rotarix is indicated for the prevention of rotavirus gastroenteritis caused by G1 and non-G1 types (G3, G4, and G9) when administered as a 2-dose series in infants and children. It was approved in the European Union in 2006, and by the US FDA in April 2008. It is taken by mouth.

Rotateq Rotateq is a live, oral pentavalent vaccine that contains five rotavirus strains produced by reassortment. The rotavirus A parent strains of the reassortants were isolated from human and bovine hosts. Four reassortant rotaviruses express one of the outer capsid, VP7, proteins (serotypes G1, G2, G3, or G4) from the human rotavirus parent strain and the attachment protein VP4 (type P7) from the bovine rotavirus parent strain. The fifth reassortant virus expresses the attachment protein VP4 (type P1A) from the human rotavirus parent strain and the outer capsid protein VP7 (serotype G6) from the bovine rotavirus parent strain. In February 2006, the US Food and Drug Administration (FDA) approved Rotateq for use in the United States. In August 2006, Health Canada approved Rotateq for use in Canada. Merck worked with a range of partners including governmental and non-governmental organisations to develop and implement mechanisms for providing access to this vaccine in the developing world, an effort which was slated to come to an end in 2020.

Rotavac Rotavac was licensed for use in India in 2014 and is manufactured by Bharat Biotech International Limited. It is a live attenuated, monovalent vaccine containing a G9P[11] human strain isolated from an Indian child. It is given by mouth in a three-dose series, four weeks apart, beginning at six weeks of age up until eight months of age.

Rotavin-M1 Rotavin-M1 was licensed for use in Vietnam in 2007 and is manufactured by the Center for Research and Production of Vaccines. The vaccine contains a G1P[8] human rotavirus strain.

Lanzhou lamb The Lanzhou lamb rotavirus vaccine was licensed for use in China in 2000 and is manufactured by the Lanzhou Institute of Biological Products. It contains a G10P[12] lamb rotavirus strain.

Rotasiil Rotasiil is a lyophilized pentavalent vaccine licensed for use in India in 2018. It contains human bovine reassortant strains of rotavirus serotypes G1, G2, G3, G4, and G9. This is the world's first thermostable vaccine which can be stored without refrigeration at or below 25 °C. Rotasiil is manufactured by the Serum Institute of India.

… excerpt ends here. Continue reading the full article.

Illustrations

Worked examples

Example 1 — a first encounter with Rotavirus vaccine

Start with the simplest possible case. Write down what Rotavirus vaccine claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In biology, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Rotavirus vaccine before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Rotavirus vaccine ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Rotavirus vaccine

In research: Rotavirus vaccine appears in biology research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Rotavirus vaccine in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Rotavirus vaccine is common in secondary-school and first-year university syllabi. It links to neighbouring topics Drugs developed by Merck & Co., Gastroenterology, Live vaccines, so understanding it makes those chapters shorter.
In everyday life: Look for Rotavirus vaccine outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Rotavirus vaccine in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Rotavirus vaccine means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Rotavirus vaccine out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Rotavirus vaccine in simple terms?

Why does Rotavirus vaccine matter?

Because it connects several biology ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Rotavirus vaccine?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Rotavirus vaccine.