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White Blood Cell Count test for detecting infections and immune system health monitoring

Blood Test for Frequent Infections and Low Immunity

White Blood Cell Count (WBC)

Google
3,138 reviews
  • Detect infections early and stay healthy
  • Reveal immune system issues quickly
  • Clarify unexplained fatigue or weakness
First results as soon as overnight*

90 day happiness guarantee

We stand behind our service

Prescription & fees included

Go directly to the lab, no extra fees

Easy to understand results

With friendly doctor's notes & guidance

Fast & convenient

Lab visit as quick as 10 mins in & out

90 day happiness guarantee

We stand behind our service

Prescription & fees included

Go directly to the lab, no extra fees

Easy to understand results

With friendly doctor's notes & guidance

Fast & convenient

Lab visit as quick as 10 mins in & out

What's this test for?

This test is ideal if you're experiencing frequent infections, unexplained fatigue, or persistent weakness that won't go away. It helps identify if your immune system is functioning properly by measuring the number of white blood cells in your body, which are responsible for fighting off infections and diseases. Many people use this test when they feel run-down, have been getting sick more often than usual, or want to understand why they're feeling constantly tired.

How should I prepare for this test?

No preparation is needed for this test. Fasting is not required, so you can eat and drink normally before your blood draw. Simply visit the lab at your convenience, and the blood sample can be collected at any time of day without affecting the accuracy of your results.

What's included in this test?

White Blood Cell Count (WBC)

This test measures your White Blood Cell Count (WBC), which tells you how many infection-fighting cells are circulating in your blood. Your WBC count is one of the most important indicators of immune system health and helps detect infections, inflammatory conditions, and certain blood disorders. This single measurement provides critical insight into whether your body is properly equipped to fight off illness and maintain overall health.

What happens after I get my results?
You'll receive detailed doctor notes in simple language explaining what your white blood cell count means for your immune health and overall wellness. These notes include personalized recommendations like lifestyle changes to boost immunity, whether you should monitor for infections more closely, or if follow-up testing might be helpful. You'll also get the standard lab report and can track your WBC levels over time using our trends feature to see how your immune system responds to changes in your health or lifestyle.
When will I get my results?
WBC results are typically available within 1-2 business days after your blood is drawn. You'll receive an email notification as soon as your results are ready to view in your secure online account, along with easy-to-understand doctor notes explaining what your numbers mean.
Who should consider getting this test?
This test is valuable for anyone experiencing frequent or recurring infections, unexplained fatigue, fever, or persistent weakness. It's also important for people with a family history of blood disorders or immune system conditions, those taking medications that affect immunity, or anyone wanting to establish a baseline for their immune health. If you've been feeling run-down or getting sick more often than usual, this test can provide important answers.
What symptoms indicate I may need this test?
Common signs that may warrant a WBC test include getting sick more frequently than normal, taking longer to recover from infections, unexplained fatigue or weakness, recurring fevers, night sweats, or swollen lymph nodes. You might also consider this test if you've noticed unusual bruising, persistent sore throats, or just feeling generally run-down without a clear reason.
How can I naturally support my immune system?
Supporting your immune health starts with getting 7-9 hours of quality sleep each night, as sleep is when your body produces infection-fighting cells. Eating a balanced diet rich in fruits, vegetables, lean proteins, and foods high in vitamins C and D can strengthen immunity. Regular moderate exercise, managing stress through meditation or yoga, staying hydrated, and avoiding smoking or excessive alcohol all help maintain healthy white blood cell function.
What does a high WBC count mean?
A high white blood cell count usually means your body is actively fighting an infection, inflammation, or stress. It can indicate bacterial or viral infections, allergic reactions, inflammatory conditions, or even physical stress from injury or surgery. While often temporary and related to fighting illness, persistently high WBC counts should be discussed with your doctor to rule out more serious conditions.
What does a low WBC count mean?
A low white blood cell count means your body may have fewer infection-fighting cells than normal, which can make you more vulnerable to getting sick. This can happen due to viral infections, certain medications, nutritional deficiencies (especially vitamin B12 or folate), autoimmune conditions, or bone marrow issues. If your WBC is low, your doctor may recommend monitoring for infections more closely and investigating the underlying cause.
How’s this work?
Getting your blood test with us is easy, private & backed by the power of science.

Long story short:
  1. In the test options, use the filters or search box to narrow your choices and find the test you want.
  2. If you need a hand navigating through options, text our super friendly support team at 754-799-7833, and we'll provide tailored suggestions to help you find the ideal test.
  3. Once your order is placed, we’ll create your doctor’s lab order remotely, without any need for you to make a trip to a doctor in person or to talk to the doctor. Expect to receive your doctor’s lab order right in your inbox. It will also be in your patient portal if you need to find it later. We’ll also include instructions regarding fasting and other requirements for your test. Your patient portal will be auto-created hassle-free during checkout.
  4. If this is your first time ordering, you'll be prompted to create a password for instant login access to your patient portal. It's a quick way to conveniently access your orders and results whenever you want.
  5. When you’re ready, visit one of our 4,000 locations. Just bring your ID – no printing or faxing of your lab order is needed, as your order and details will already be in the lab system.
  6. Note that most lab locations don’t accept walk-ins, so it’s best to book an appointment in advance. Don’t worry – we’ll provide detailed instructions along the way.
  7. You’ll get your results via email & SMS and dive into understanding your body better. Yup, that easy!
  8. If you have any questions, please text us at 754-799-7833 or email [email protected] and we'll gladly help you.
How do I know which test to get?
In the test options, find the test you want. If you’re not sure which test to get, we can lend a hand in finding the right option.

Just text or call us at 754-799-7833, email us at [email protected], and we'll gladly help you. We've got your back and reply quickly.
Is it possible to make changes to my lab order if I made a mistake with the name, date of birth, or any other details?
Absolutely! We totally understand that errors can happen. No worries, we're here to help you.

Just reach out to us via text at 754-799-7833 or shoot us an email at [email protected]. Remember to include your order number and let us know the correct information you’d like to update. Our awesome team will jump right in and make sure everything is sorted out and accurate for you.

There are no changes necessary if your address is wrong on the requisition though. We don’t mail anything out.

Our lab requires an address to be listed to generate an order.
Do you accept health insurance?
Only HSA & FSA is accepted.

Our services are strictly self-pay and cannot be submitted to your health insurance provider except for Health Savings Accounts or Flexible Savings Accounts.

This policy applies to all insurance companies, including federal health insurance programs like Medicare.

If you have any questions, please text us at 754-799-7833 or email [email protected].
Can I cancel my order?
Yes.

We get it – sometimes your needs change.

As long as your samples haven’t been collected yet, we’re happy to help you cancel your order.

If you have any further questions, please text us at 754-799-7833 or email [email protected].

You can read more about our cancellation policy here.
How can I find a lab location near me?
During the ordering process, you’ll be able to select a specific lab near you, with no strings attached! You can switch it up later easily and visit any of our authorized locations as long as it’s the same lab company you selected your test for (Quest Diagnostics or Labcorp).

Before you proceed with your order, feel free to browse through all our lab locations here. This will give you the peace of mind of knowing that there's a lab nearby your home, office or your favorite gym.

If you have any questions, please text us at 754-799-7833 or email [email protected] and we'll gladly help you.

Here’s why 1,000,000+ customers chose us for affordable hassle-free private blood testing.

You get clinical lab reports & simplified health insights.
Save time & gas, go straight to the lab. Our doctors cover the rest.
Results start landing the next day after your lab visit.*
We don’t sell or share your data. Your time & privacy matter.
US-licensed doctors have your back if things get unclear.
No hidden fees, nice discounts for regular checkups.
Save a trip to the doctor, go directly to the lab
Instant orders, results often overnight*
Results explained in simple language
Reviewed by US licensed doctors
Fast & confidential, we never sell or share your data
No insurance needed, transparent pricing
Demo results
White Blood Cell Count (WBC) 3.8 K/uL
Demo results
Low Optimal 4.5 - 11.0 High
3.8 K/uL

What this means

Your white blood cell count is slightly below the optimal range, which means your body may have fewer infection-fighting cells than ideal. While this is not necessarily alarming, it could make you more susceptible to infections and may explain feelings of fatigue or getting sick more frequently. Monitoring this level and supporting your immune system through lifestyle changes can be helpful.

* Regular blood test results (e.g., CBC) typically start arriving the next business day after sample collection. More complex tests, such as hormone panels, may take up to 10–15 business days due to their complexity.
Here’s how easy it is to get blood work done on your terms
Choose a checkup
Order your test Save a trip to the doctor. Your results will come with clear, friendly explanations. Takes 2 minutes
Book a lab
Book an appointment Visit any of our 4,000 nearby lab locations to have your samples collected. Book or walk-in
Choose a checkup
Get results Receive a clear, easy-to-digest health report by email & SMS within a few business days. Get answers, fast

Blood Test for Frequent Infections and Low Immunity

Google
3,138 reviews
  • Detect infections early and stay healthy
  • Reveal immune system issues quickly
  • Clarify unexplained fatigue or weakness

1,000,000+ blood tests later, here's what our customers say

Google reviews 3138 reviews Next
Still got questions? Text our super-cool support team at 754-799-7833 to get help finding your ideal checkup.