Communicable diseases involve many related ideas that are easy to mix up. This quiz gives you practice with transmission, prevention, common infections, and infection-control knowledge. You’ll work through direct knowledge questions, comparisons, cause-and-effect questions, and applied judgment. The question bank also includes several areas that require you to separate similar terms and situations carefully.
What This Quiz Covers
- Pathogen exposure, transmission, incubation, carriers, and communicable phases
- Vaccination, influenza, pandemics, tuberculosis, and respiratory infections
- COVID-19 transmission and short- and long-term effects
- Hepatitis A, B, and C transmission, symptoms, prevention, and complications
- Chickenpox, shingles, C. difficile, measles, rubella, MRSA, VRE, herpes simplex, and sexually transmitted infections
How to Use This Quiz
Answer each question as if you were writing a multiple-choice test. Read every answer choice before choosing the best response.
Use 80% or higher as a personal study target for this practice quiz.
After finishing, review the explanations for every question you missed.
Each attempt shows 15 random questions from a larger bank containing 263 questions.
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Results
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#1. Which foods or drinks are recognized sources of hepatitis A exposure?
Correct answer: B. Contaminated water or ice, undercooked shellfish, and raw produce
Explanation: Hepatitis A can be acquired through fecally contaminated food or water. Identified sources include contaminated water or ice, raw or undercooked shellfish, and raw fruits or vegetables.
Why A is wrong: These are safer choices rather than the identified exposure sources.
Why C is wrong: These do not match the identified higher-risk sources.
Why D is wrong: Boiled water and peeled fruit are safer travel choices.
#2. Which pairing correctly describes possible long-term COVID-19 effects?
Correct answer: A. Heart muscle damage and lung scarring
Explanation: Lasting heart muscle damage has been observed after COVID-19, and lung injury can produce scar tissue and long-term breathing problems. These effects involve different organs but both are documented possible longer-term consequences.
Why B is wrong: Painful vesicles fit other infections, not the COVID-19 effect being compared.
Why C is wrong: These findings belong to other communicable conditions.
Why D is wrong: Chronic hepatitis is a different disease process.
#3. Which statement about MRSA and VRE vaccination is accurate?
Correct answer: D. No vaccine is identified for either
Explanation: No vaccine is identified for MRSA or VRE. Prevention therefore relies on infection-prevention measures rather than vaccination against these organisms.
Why A is wrong: Neither infection has the identified vaccine.
Why B is wrong: MRSA does not have the identified vaccine.
Why C is wrong: VRE does not have the identified vaccine.
#4. Which people were particularly affected by severe COVID-19 during the pandemic?
Correct answer: D. Very old people and people with compromised immunity
Explanation: Severe COVID-19 affected people of many ages, with particularly serious effects among very old people and those with compromised immunity. Vulnerability was not limited to one age group.
Why A is wrong: Severe illness was not limited to healthy middle-aged adults.
Why B is wrong: Gastrointestinal illness was not the defining vulnerability.
Why C is wrong: Previous influenza infection did not define the high-risk group.
#5. Which situation best illustrates hepatitis A transmission?
Correct answer: B. Eating food contaminated with traces of feces
Explanation: Hepatitis A spreads by the fecal-oral route. Contaminated food, water, ice, and eating or drinking vessels can carry the virus.
Why A is wrong: Airborne spread does not describe hepatitis A transmission.
Why C is wrong: Bloodstream exposure fits hepatitis B or C more closely.
Why D is wrong: This describes a possible herpes transmission route.
#6. What happens to larger COVID-19 respiratory droplets as they move through the air?
Correct answer: A. They tend to fall because of gravity
Explanation: Larger respiratory droplets fall out of the air because of gravity. Smaller droplets and particles can spread apart and remain airborne longer.
Why B is wrong: Droplet concentration decreases with distance.
Why C is wrong: Larger droplets do not remain suspended indefinitely.
Why D is wrong: Respiratory particles do not become blood-borne particles.
#7. What does the term long-hauler describe in relation to COVID-19?
Correct answer: D. A person who experiences continuing effects after the infection
Explanation: Some people continue to experience effects after COVID-19 and are described as long-haulers. Chronic fatigue-like problems are among the longer-term effects being studied.
Why A is wrong: Long-hauler does not mean years of contagiousness.
Why B is wrong: The term does not describe an extended incubation period.
Why C is wrong: Repeated asymptomatic infection does not define a long-hauler.
#8. Which statement about C. difficile prevention and immunization is accurate?
Correct answer: B. Handwashing is especially important, and no vaccine is listed
Explanation: Handwashing receives special emphasis because hand rubs do not kill C. difficile bacteria. No immunization is listed for this infection.
Why A is wrong: Hand rub does not replace the emphasized handwashing measure.
Why C is wrong: MMR does not protect against C. difficile.
Why D is wrong: Influenza vaccination targets influenza rather than C. difficile.
#9. Which contact does NOT transmit hepatitis C as described?
Correct answer: C. Hugging or shaking hands with an infected person
Explanation: Hepatitis C is not spread through casual contact such as hugging, kissing, or shaking hands. Blood exposure and contaminated equipment or personal items present different risks.
Why A is wrong: Shared contaminated drug equipment is a listed transmission risk.
Why B is wrong: Sharing contaminated personal-care items is a listed risk.
Why D is wrong: Procedures using contaminated equipment can transmit HCV.
#10. Which activity can increase the production of infectious respiratory particles in a poorly ventilated space?
Correct answer: A. Singing or exercising
Explanation: Heavy breathing during activities such as singing or exercising is identified in situations where infectious smaller droplets and particles became concentrated in poorly ventilated spaces.
Why B is wrong: This does not match the enclosed-space situation described.
Why C is wrong: Drinking water does not increase respiratory particle production.
Why D is wrong: Vaccination does not produce infectious respiratory particles.
#11. Which person faces a greater stated risk of developing chronic hepatitis B after infection?
Correct answer: A. A person infected before age seven
Explanation: Infection before age seven is associated with a higher risk of chronic hepatitis B. Most adults clear acute HBV infection and develop lifelong protection.
Why B is wrong: Clearing the virus describes recovery rather than chronic infection.
Why C is wrong: Vaccination protects against infection.
Why D is wrong: Lifelong protection follows successful clearance rather than chronic infection.
#12. What relationship do herpes simplex and herpes varicella-zoster share?
Correct answer: A. Both belong to the Herpesvirus family and have similar DNA characteristics
Explanation: Herpes simplex and herpes varicella-zoster both come from the Herpesvirus family. Their DNA similarities are why they are described as related viruses.
Why B is wrong: They are not hepatitis viruses.
Why C is wrong: They are viruses rather than bacterial infections.
Why D is wrong: HPV is a different virus.
#13. When can dark urine and jaundice develop during acute hepatitis?
Correct answer: A. After about two weeks in some clients
Explanation: Dark urine and jaundice can develop after about two weeks in some clients with acute hepatitis. They do not occur in every client.
Why B is wrong: These findings are not immediate or universal.
Why C is wrong: Six months marks the distinction for chronic hepatitis.
Why D is wrong: Liver transplantation is unrelated to the onset of these symptoms.
#14. What can happen when cirrhosis progresses to complete liver failure?
Correct answer: A. A liver transplant might become necessary
Explanation: Cirrhosis replaces normal liver cells with scar tissue and can progress to complete liver failure. Life-saving liver transplantation might then be required.
Why B is wrong: Complete liver failure does not automatically reverse.
Why C is wrong: Hepatitis does not transform into influenza.
Why D is wrong: MMR vaccination does not treat liver failure.
#15. Which group contains possible complications of chronic hepatitis B?
Correct answer: A. Cirrhosis, liver failure, liver cancer, and premature death
Explanation: Chronic hepatitis B can lead to serious progressive liver disease. Listed complications include cirrhosis, liver failure, liver cancer, and premature death.
Why B is wrong: These are separate infectious diseases or complications unrelated to chronic HBV progression.
Why C is wrong: These conditions do not describe chronic hepatitis B complications.
Why D is wrong: These are unrelated infections or symptoms.
How to Read Your Score
Your score shows how well you handled the material during that attempt. Use 80% or higher as a personal study target, not as an official passing score. A score from 60% to 79% points to areas that need more review. A score below 60% gives you a clear reason to return to the matching study notes before trying again. Because each attempt uses 15 questions from the larger bank, another attempt might contain different questions. Small score changes between attempts are normal.
What Your Mistakes Might Show
This question bank puts a lot of weight on comparisons, direct knowledge, cause and effect, and application. If comparison questions give you trouble, review areas where related communicable diseases or transmission patterns need to be separated. Missed cause-and-effect questions might point to a need to review relationships between transmission, infection, and outcomes. Application questions might show that you need more practice using known information in care situations. Terminology questions might point to confusion between similar terms. Two-step judgment questions might show that you need more practice connecting two pieces of information before choosing the best response.
Questions You Guessed On Matter Too
Review more than the questions you got wrong. Look at questions you guessed on, changed several times, found difficult, or answered correctly without feeling confident. A correct guess raises your score, but it does not always show solid understanding. Review why the correct response fits and why the closest wrong answer choice does not.
Review and Retake
- Read the explanation for each missed question.
- Identify why the selected wrong answer choice seemed correct.
- Include questions that were guessed on or felt uncertain.
- Review the matching section of the study notes.
- Explain the correct answer in your own words.
- Return later for another attempt after reviewing.
If a wrong answer looked believable, think about what made it seem right before you move on. The goal is to understand the reasoning, not memorize answers from an earlier attempt. Give yourself some review time between attempts when you need it.
Track Your Quiz Progress
The quiz shows your score for the current attempt, but it does not provide a detailed study log. Keep your own record in a notebook, planner, spreadsheet, or note on your phone. Record the date, score, one or two areas that caused trouble, and questions you guessed on or felt unsure about. Each attempt uses a different selection from the larger bank, so small score changes are normal. Look for stronger understanding and fewer uncertain answers over time.
A lower score gives you useful information about where to begin. Start with the area that caused the most trouble, review it carefully, then return for another attempt when the material feels clearer.
A lower score gives you useful information about where to begin. Start with the area that caused the most trouble, review it carefully, then return for another attempt when the material feels clearer.
Continue Studying
Review this topic again or return to the wider CCA exam study plan when you’re ready for your next study session.