August 20, 2026

A patient may present a cough, fever, sore throat, and congestion, but identifying the cause can be challenging. Typical cold-like symptoms may be associated with COVID-19, influenza A or B, RSV, or even Group A strep. Symptoms alone often don’t identify the source of illness; however, rapid testing can aid in pinpointing a possible cause during a single office visit, supporting informed next steps and timely follow-up. 

Respiratory Illness is a Year-round Concern 

Respiratory pathogens do not peak at the same time or vanish outside the traditional cold-and-flu season. COVID-19 activity can increase during warmer months; influenza testing remains relevant as flu viruses circulate; RSV testing continues for appropriate patient populations; and sore throat and pharyngitis remains a common clinical concern throughout the year.

Because several illnesses may circulate at once, knowing what may be causing a patient’s symptoms is relevant.

Why Symptoms May Overlap 

Fever, cough, fatigue, sore throat, congestion or runny nose, headache, and shortness of breath can occur with more than one respiratory infection. COVID-19 and influenza may have similar presentations, and RSV can also resemble other viral respiratory illnesses. 

Strep throat is a little different. While sore throat is a common reason for a patient to visit, strep infection is not automatically indicated. Viruses are the most common cause of pharyngitis, while the bacteria Group A Streptococcus is estimated to cause about 5–15% of pharyngitis cases in adults and 20–30% in children. That distinction illustrates why testing can be useful when evaluating a sore throat: not every sore throat is strep, and not every respiratory illness has the same follow-up considerations.

Similar symptoms. Different pathogens. Different follow-up considerations. 

Testing helps inform next steps and augments clinical judgment, a patient history, physical examination, and a healthcare-provider evaluation. 

Why Timely Testing Matters 

Prompt testing may help patients and providers have earlier conversations about time-sensitive care decisions. For eligible patients at higher risk of severe COVID-19, some prescription treatment options must be started within a defined window after symptoms begin, for example, certain oral treatments need to begin within five days.

Similarly, influenza antiviral treatment offers the greatest benefit when started early, ideally within 48 hours of symptom onset. This does not mean every patient needs or is eligible for treatment. Rather, the reasons why patients with symptoms, particularly those at higher risk or with worsening illness, should contact a healthcare professional promptly to discuss appropriate evaluation and care are underscored. In this scenario, a rapid result can reduce uncertainty and support earlier follow-up discussions when timing matters. 

Matching the Test to the Concern 

COVID-19 and Flu A/B 

COVID-19 and influenza can present with many of the same symptoms, making combination testing a practical option when both are clinical considerations. Healgen^® Rapid Check^® COVID-19/Flu A&B Antigen Test options are designed for qualitative detection and differentiation of SARS-CoV-2, influenza A, and influenza B antigens from anterior nasal swab specimens in symptomatic individuals.

Professional and OTC/self-test formats are available. The Healgen^® Rapid Check^® COVID-19/Flu A&B Antigen Test is authorized for non-prescription home use by people ages 14 and older testing themselves, or by adults testing individuals ages 2 and older. The Healgen^® Rapid Check^® COVID-19/Flu A&B Antigen Test Pro is available for professional use in a healthcare setting.

COVID-19 

COVID-19 antigen testing may be useful when COVID-19 is the predominant virus circulating or to perform follow up testing for a negative result. For Healgen self-test instructions, repeat testing may be indicated 48 to 72 hours after an initial negative result. 

RSV 

RSV can be particularly concerning for young children and older adults. The Healgen^® Rapid Check^® RSV Antigen Test is intended to aid rapid laboratory diagnosis of acute RSV infection in symptomatic children under 6 years of age and adults over 60. Nasopharyngeal swab and nasal aspirate specimens have been validated.

As with any diagnostic test, the correct specimen type, collection procedure, patient population, and instructions for use are essential to appropriate use and interpretation. 

Strep A 

A rapid strep test helps detect Group A Streptococcus in symptomatic patients with a sore throat. This is important because viral infections are common causes of sore throat, while strep is bacterial and should be evaluated differently.

The Healgen^® Rapid Strep A Antigen Test is a qualitative test that uses throat swab specimens to aid in the diagnosis of Group A streptococcal infection. A healthcare provider should interpret results alongside symptoms, examination findings, and applicable clinical guidance.

Testing Settings: At-home and Near-patient 

Respiratory testing can fit a range of healthcare and patient-access settings, including: 

• Primary-care and pediatric clinics 

• Urgent-care centers 

• Retail clinics 

• Assisted-living facilities 

• Telehealth-supported care 

• At-home settings, when an OTC self-test is appropriate 

Consumer self-testing is designed for non-professional use under the conditions described in a product’s instructions. Professional point-of-care testing is performed by trained personnel in clinical or near-patient environments and may support assessment during the patient encounter. 

Regardless of setting, users should follow the exact product instructions, specimen-collection procedures, timing requirements, age limitations, storage conditions, and intended-use statement for the selected test. 

Understanding Results and Next Steps 

A test result is useful information, not a complete diagnosis. 

• Positive result: A positive result may help guide communication with a healthcare provider, precautions to reduce spread, and further evaluation. Co-infection is not ruled out. 

• Negative result: A negative antigen result may be presumptive and does not completely rule out infection, particularly if symptoms are ongoing, worsening, or inconsistent with the initial test result. 

• Persistent or worsening symptoms: Patients should seek follow-up care for concerning symptoms such as fever, worsening cough, shortness of breath, chest discomfort, dehydration, confusion, or other signs that require medical attention. 

Healthcare professionals and consumers should follow the relevant product instructions for use and consult a healthcare provider for guidance on symptoms, results, confirmatory testing when appropriate, and treatment decisions. 

Know More, Sooner 

Healgen offers rapid respiratory testing options across COVID-19, flu A/B, RSV, and Strep A to support testing needs in professional and consumer settings. Explore Healgen’s website to find the appropriate option for your setting and testing needs. Always follow the product instructions for use and consult a healthcare professional for guidance on symptoms, results, and treatment decisions. 

Learn more about all of Healgen’s respiratory solutions here.