Mastering Library Search Tools: A Guide for Global/Public Health Students (and Busy Professionals)

At the Coalition for Global Health Innovation, we know that the best ideas in global health fail without access to good evidence. Whether addressing infectious disease outbreaks, evaluating health policies, designing community interventions, or advancing health equity, public health professionals rely on high-quality evidence to inform decisions. The ability to efficiently locate, evaluate, and apply research is therefore a core competency for students, researchers, policymakers, and practitioners worldwide.

Finding accurate and reliable information is one of the most important skills in public health. Whether you are conducting research, writing a literature review, developing a community health program, or making evidence-based decisions, the quality of your work depends on the quality of the information you use.

With so much information available online, knowing where to search and how to search effectively can be challenging. A simple Google search may provide thousands of results, but not all sources are credible, relevant, or appropriate for academic and professional research.

This is where librarians play an important role. Modern health sciences librarians are more than information providers; they are educators and research partners who help students, researchers, and healthcare professionals navigate the complex world of information. Librarians teach essential skills such as developing search strategies, selecting the most appropriate databases, using controlled vocabulary, and evaluating sources for quality and relevance.

By learning these skills, public health professionals can find stronger evidence, save time during the research process, and make more informed decisions based on reliable information.

This guide introduces the fundamental principles of searching for public health information and provides practical guidance on using key research tools, including Google Scholar, PubMed, Scopus, and the Internet Archive. Whether you are a student beginning your first literature search or an experienced professional looking to strengthen your research skills, these techniques will help you locate high-quality evidence more effectively and efficiently.

Why Research Skills Matter in Public Health

Public health professionals need more than a large number of articles—they need the most relevant, reliable, and high-quality evidence. Strong research skills help you:

  • Find trustworthy information quickly

  • Evaluate the quality of sources

  • Clearly explain how you found them

This makes your research more transparent, credible, and useful for decision-making, whether you are writing a paper, developing a health program, or conducting a literature review.

Getting Started: From Idea to Search Strategy

Every research project begins with a question. Once you have identified your research question, the next step is to break it down into its main concepts and think about the terms you will use to search for information.

Example: If you want to find studies about community-based interventions to reduce maternal mortality in rural Nigeria, your key concepts are:

  • Maternal mortality (or maternal death)

  • Nigeria (or "West Africa")

  • Community health workers (or CHWs)

Then consider alternative terms that authors may use, such as "maternal death," "perinatal mortality," "Federal Republic of Nigeria," or "community health volunteers."

Thinking about synonyms, related terms, abbreviations, and alternative spellings before you begin searching can help you find more relevant results and reduce the chance of missing important studies.

Google Scholar: The Best First Starting Point

Google Scholar is excellent for quickly understanding what exists on a topic and finding related work. It's free, accessible to anyone with an internet connection, and a great place to begin.

Why It's Useful:

  • Built-in citation formatting (APA, MLA, etc.)

  • Often shows free full-text PDFs

  • "Cited by" helps track influence over time

Search Tips:

  • Use quotes for exact phrases: "social determinants of health"

  • Use "Cited by" to find newer studies that built on an earlier one

  • Use "Related articles" to expand your search

  • Look for [PDF] links for free access

Citation tip: Always double-check citations for accuracy before submitting your work.

PubMed: The Public Health & Biomedical Powerhouse

If your topic involves health, medicine, epidemiology, prevention, or clinical outcomes, PubMed is a top starting point. It's free and includes millions of citations from biomedical and public health literature.

How to Search Smarter:

  • Use MeSH terms to standardize concepts. MeSH (Medical Subject Headings) is PubMed's controlled vocabulary that automatically finds articles even when authors use different words for the same concept.

  • Combine ideas with Boolean operators: AND (narrows), OR (broadens), NOT (excludes)

    • AND narrows: vaccines AND hesitancy

    • OR expands: adolescent OR teen OR youth

    • NOT excludes: HIV NOT animals

  • Apply filters carefully (date, article type, age group)—filtering too early can hide relevant studies

Workflow tip: Start broad → scan results → refine using MeSH and better keywords

Keep a simple search log: databases, terms, filters, date. Takes two minutes to save your results.

Scopus: For Depth, Tracking, and Trends

Scopus is powerful for literature reviews and tracking research impact. It covers a wider range of disciplines than PubMed and offers advanced citation analysis.

Best for: systematic searching, citation tracking, research trends

High-Value Uses:

  • Identify highly cited, foundational studies

  • Track how topics evolve over time

  • Find key authors and institutions in a field

Note: Scopus is subscription-based. Check with your institution or library for access.

WorldCat: Find Materials Anywhere

WorldCat is a global catalog that helps you locate books, theses, and reports worldwide.

Best for: books, dissertations, foundational texts

Pro tip: If your library doesn't have an item, request it through Interlibrary Loan (ILL).

Internet Archive: Free Access to Hard-to-Find Materials

The Internet Archive is a valuable digital library for older or rare materials.

Best for: historical public health texts, older editions, out-of-print books

Many items are borrowable digitally for free, with no subscription required.

Two Concepts That Change Everything

Gray Literature (Essential in Public Health)

Gray literature includes research outside traditional journals and often contains the most current, real-world data. In public health, gray literature can be as important as peer-reviewed articles.

Examples:

  • Government reports

  • NGO and UN publications

  • Policy briefs and program evaluations

Where to find it:

  • Government and agency websites (WHO, ministries of health)

  • Institutional repositories

  • Google Scholar

Start with WHO IRIS (institutional repository) at iris.who.int – it's free and contains thousands of reports not found in journals.

Why it matters: Gray literature often provides timely insights from real programs that haven't yet appeared in peer-reviewed journals.

Open Access

Open access means research is free to read online for anyone, anywhere.

How to spot it:

  • "Free full text" in PubMed

  • PDF links in Google Scholar

  • Open-access labels in databases

Why it matters: Open access ensures equitable access to knowledge globally, regardless of institutional wealth or geography.


Global Access Support: WHO & HINARI

Access barriers are real. Many professionals and students around the world cannot afford expensive journal subscriptions.

Programs like HINARI (supported by the World Health Organization) provide free or low-cost access to thousands of journals and books in eligible low- and middle-income countries.

If you collaborate internationally or work in a resource-limited setting, checking HINARI access can significantly expand the resources available to you.

When You Can't Find the Article (This Is Normal)

Before giving up, try these steps in order:

  1. Search the exact article title in Google Scholar – look for PDF links on the right

  2. Check PubMed Central – free full-text archive

  3. Try the Internet Archive – especially for books and older materials

  4. Search multiple databases – not everything is in one place

  5. Email the author directly – most researchers will share a PDF for free

  6. Request via Interlibrary Loan (ILL) – available through many libraries

No library access? Search the article title in Google Scholar, then click "All X versions" – one is often a free preprint or repository copy.

Your Library Is Your Research Advantage

When you're stuck, your library is not just a place—it's a strategy.

What to use if you have library access:

  • LibGuides (research guides curated by librarians)

  • Your library's database list

  • Librarian consultations for search help

If you don't have a local library:

  • Use free resources: PubMed, Google Scholar, WHO IRIS, Internet Archive

  • Check HINARI eligibility for your country

  • Join professional networks where colleagues share articles

Common Library Terms (Reference)

  • An article evaluated by experts before publication

  • A searchable collection of articles, books, reports (e.g., PubMed, Scopus)

  • Words or phrases that describe your topic

  • Standardized terms used by databases to organize information

  • PubMed's controlled vocabulary for biomedical and public health literature

  • Database-assigned terms describing an article's main topics

  • AND (narrows), OR (broadens), NOT (excludes)

  • Using quotation marks for exact phrases, e.g., "South Africa"

  • Using to find word variations.

    Example: epidemiolog* finds epidemiology, epidemiologist, epidemiologic

  • Restrict results by date, language, article type, age group

  • Using reference lists or "Cited By" links to find related studies

  • Borrow materials from other libraries when not available locally

Quick-Start Toolbox for Public Health Evidence

  • Finding biomedical and public health research without guessing every synonym

  • Discovering related studies, tracking citations, and locating free PDFs

  • Accessing WHO reports, policy documents, and technical guidance not found in journals

  • Finding older textbooks, reports, and out-of-print materials

  • Free or low-cost access to journals in eligible countries

  • Refining search strategies and locating difficult-to-find resources

  • Getting a free PDF when no other access exists

Final Takeaways

Try this today: Pick one question you're stuck on. Spend 15 minutes on PubMed with MeSH. Then, if you have access, ask a librarian for help. If not, search WHO IRIS or email an author. You'll find better evidence faster.

Remember: In global health, good evidence saves lives. Mastering these search tools isn't just about better grades or reports—it's about making decisions that improve health outcomes for the communities you serve.


This guide was written by

Khadija El-Hazimy, MPH

Resource and sharing Specialist at Yale University