astronomy

Helen Petousis-Harris

Helen Petousis-Harris is a astronomy 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 Helen Petousis-Harris rather than just read about it. In short: Helen Aspasia Petousis-Harris is a New Zealand vaccinologist and associate professor in the Department of General Practice and Primary Health Care at the University of Auckland. She has been involved in research related to vaccination in New Zealand since 1998, with her main areas of focus being vaccine safety and effectiveness.

Key takeaways

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

Reference excerpt

Helen Aspasia Petousis-Harris is a New Zealand vaccinologist and associate professor in the Department of General Practice and Primary Health Care at the University of Auckland. She has been involved in research related to vaccination in New Zealand since 1998, with her main areas of focus being vaccine safety and effectiveness. Petousis-Harris has had a variety of lead roles in New Zealand and international organisations that focus on vaccination and is a regular media spokesperson in this field, especially during the COVID-19 pandemic.

Career From 1999 to 2002 Petousis-Harris was a researcher at the University of Auckland, working with the Immunisation Advisory Centre, a New Zealand-wide organisation based at the university. She continued in various roles at the centre, including honorary assistant research fellow and director of research from 1998. Between 2008 and 2011, she worked on her doctorate and wrote a thesis titled Factors associated with vaccine reactogenicity in school aged children and young adults following administration of two protein-based vaccines. Petousis-Harris was a senior lecturer at the Department of General Practice and Primary Health Care, University of Auckland from 2012 until February 2020 when she attained the position of associate professor. In 2013 The Immunisation Advisory Centre (IMAC) set up the Vaccine Safety Expert Advisory Group, composed of "clinicians, scientists and policymakers who [had] either expertise and/or a professional interest in the safety of vaccines used in New Zealand", and Petousis-Harris has been a member of the group since it began. Petousis-Harris became group director in 2018 of the Vaccine Datalink and Research Group, which is based at Auckland University and has a primary goal of "investigating the risks and benefits of vaccines using pharmacoepidemiologic approaches...[and]...vaccine development, vaccine immunology, and vaccine risk communication". Working with Steven Black, a "specialist in paediatric infectious diseases and vaccinology who had led major projects for the American Centres for Disease Control (CDC) and for the World Health Organization", Petousis-Harris established the internationally networked Global Vaccine Data Network (GVDN) in 2019. As of 2023 she remains co-director of GVDN, a role held since the beginning of the project. Petousis-Harris was a member of the World Health Organization Global Advisory Committee on Vaccine Safety in 2017, being chair 2018–2020. and is a former member of the International Brighton Collaboration Science Board. As from 2020, Petousis-Harris has been a member of the COVID-19 Immunisation Implementation Advisory Group (IIAG) which provides advice for the New Zealand Ministry of Health to implement the COVID-19 immunisation campaign, and part of the COVID-19 Vaccine Technical Advisory Group (CV TAG).

Areas of expertise

Pneumococcal vaccines A paper by Petousis-Harris in 2013 traced the history of the development of capsular polysaccharide vaccines against S. pneumoniae and noted the importance of this programme in reducing community-acquired pneumonia (CAP), bacterial meningitis, bacteremia and otitis media (OM), commonly known as middle ear infection. The same paper signalled concerns about ethnic inequalities in New Zealand with regard to hospital admissions due to this, and Petousis-Harris cited research that showed: an increase in acute hospital admissions for infectious diseases in general between 1989 and 2008 and most significantly for LRI. Hospitalisation for pneumonia and influenza almost doubled during this time period and age-standardised hospitalisations for Māori and Pacific increased progressively throughout the 1990s Petousis-Harris concluded that while vaccination was important for Maori and Pacific Island children, these inequalities may also result from factors such as overcrowding, poor housing and access to primary health care. In 2015, research by Petousis-Harris and Colin Barber presented at the Annual Scientific Meeting of the Australasian Society for Infectious Diseases, showed preliminary figures that the rates of hospitalisation from invasive pneumococcal disease in children aged six years and under, had halved, with a 70% reduction for Maori and Pacific children. Prior to the conference, Petousis-Harris had drawn attention to the risks of children suffering permanent hearing loss if ear infections were not dealt with promptly by vaccination. In particular, along with her colleague, Colin Barber, she noted that compared to Pakeha children, almost twice as many Maori and Pacific Island children were at risk, with one-in-ten failing hearing tests when they started school. The study showed that vaccination helped reduce middle ear infections, and urged parents to monitor their children closely. Petousis-Harris earlier said the study demonstrated that the vaccine Synflorix reduced pneumonia, middle ear infections and hospitalisation from invasive pneumococcal disease (IPD).

… excerpt ends here. Continue reading the full article.

Worked examples

Example 1 — a first encounter with Helen Petousis-Harris

Start with the simplest possible case. Write down what Helen Petousis-Harris claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In astronomy, 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 Helen Petousis-Harris 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 Helen Petousis-Harris 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 Helen Petousis-Harris

In research: Helen Petousis-Harris appears in astronomy 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 Helen Petousis-Harris 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: Helen Petousis-Harris is common in secondary-school and first-year university syllabi. It links to neighbouring topics Academic staff of the University of Auckland, Living people, New Zealand scientists, so understanding it makes those chapters shorter.
In everyday life: Look for Helen Petousis-Harris 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.

Ask Teacher Smith questions about this articleOpens your AI tutor with a question about “Helen Petousis-Harris” →

Affiliate

Preply — study more efficiently by working with a personal tutor. 50% off.

How to study Helen Petousis-Harris in 20 minutes

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

Frequently asked questions

What is Helen Petousis-Harris in simple terms?

Why does Helen Petousis-Harris matter?

Because it connects several astronomy 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 Helen Petousis-Harris?

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 Helen Petousis-Harris.