science

RVSV-ZEBOV vaccine

RVSV-ZEBOV vaccine is a science 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 RVSV-ZEBOV vaccine rather than just read about it. In short: Recombinant vesicular stomatitis virus–Zaire Ebola virus (rVSV-ZEBOV), also known as Ebola Zaire vaccine live and sold under the brand name Ervebo, is an Ebola vaccine for adults that prevents Ebola caused by the Zaire ebolavirus. When used in ring vaccination, rVSV-ZEBOV has shown a high level of protection.

Key takeaways

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

Reference excerpt

Recombinant vesicular stomatitis virus–Zaire Ebola virus (rVSV-ZEBOV), also known as Ebola Zaire vaccine live and sold under the brand name Ervebo, is an Ebola vaccine for adults that prevents Ebola caused by the Zaire ebolavirus. When used in ring vaccination, rVSV-ZEBOV has shown a high level of protection. Around half the people given the vaccine have mild to moderate adverse effects that include headache, fatigue, and muscle pain. rVSV-ZEBOV is a recombinant, replication-competent viral vector vaccine. It consists of rice-derived recombinant human serum albumin and live attenuated recombinant vesicular stomatitis virus (VSV), which has been genetically engineered to express the main glycoprotein from the Zaire ebolavirus so as to provoke a neutralizing immune response to the Ebola virus. The vaccine was approved for medical use in the European Union and the United States in 2019. It was created by scientists at the National Microbiology Laboratory in Winnipeg, Manitoba, Canada, which is part of the Public Health Agency of Canada (PHAC). PHAC licensed it to a small company, Newlink Genetics, which started developing the vaccine; Newlink in turn licensed it to Merck in 2014. It was used in the DR Congo in a 2018 outbreak in Équateur province, and has since been used extensively in the 2018–20 Kivu Ebola outbreak, with over 90,000 people vaccinated.

Medical use Nearly 800 people were ring vaccinated on an emergency basis with VSV-EBOV when another Ebola outbreak occurred in Guinea in March 2016. In 2017, in the face of a new outbreak of Ebola in the Democratic Republic of the Congo, the Ministry of Health approved the vaccine's emergency use, but it was not immediately deployed.

Effectiveness In April 2019, following a large-scale ring-vaccination scheme in the DRC outbreak, the WHO published the preliminary results of its research, in association with the DRC's Institut National pour la Recherche Biomedicale, into the effectiveness of the ring vaccination program, stating that the rVSV-ZEBOV-GP vaccine had been 97.5% effective at stopping Ebola transmission, relative to no vaccination.

Side effects Systemic side effects include headache, feverishness, fatigue, joint and muscle pain, nausea, arthritis, rash, and abnormal sweating. Injection-site side events include injection-site pain, swelling, and redness.

Biochemistry rVSV-ZEBOV is a live, attenuated recombinant vesicular stomatitis virus (VSV) in which the gene for the native envelope glycoprotein (P03522) is replaced with that from the Ebola virus (P87666), Kikwit 1995 Zaire strain. Manufacturing of the vaccine for the Phase I trial was done by IDT Biologika. Manufacturing of vaccine for the Phase III trial was done by Merck, using the Vero cell line, which Merck already used to make its RotaTeq vaccine against rotavirus.

History

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Illustrations

Worked examples

Example 1 — a first encounter with RVSV-ZEBOV vaccine

Start with the simplest possible case. Write down what RVSV-ZEBOV vaccine claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, 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 RVSV-ZEBOV 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 RVSV-ZEBOV 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 RVSV-ZEBOV vaccine

In research: RVSV-ZEBOV vaccine appears in science 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 RVSV-ZEBOV 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: RVSV-ZEBOV vaccine is common in secondary-school and first-year university syllabi. It links to neighbouring topics Drugs developed by Merck & Co., Ebola vaccines, Health in West Africa, so understanding it makes those chapters shorter.
In everyday life: Look for RVSV-ZEBOV 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 RVSV-ZEBOV vaccine in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what RVSV-ZEBOV 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 RVSV-ZEBOV vaccine out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is RVSV-ZEBOV vaccine in simple terms?

Why does RVSV-ZEBOV vaccine matter?

Because it connects several science 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 RVSV-ZEBOV 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 RVSV-ZEBOV vaccine.