Seasonal house call · Differential diagnosis
Influenza vs. Common Cold
Influenza vs. Common Cold is a seasonal health occasion for which RAB Arztbesuche provides a licensed physician on a home visit anywhere in Berlin — daily from 6 am to midnight, usually within 60 to 90 minutes.
Influenza and the common cold are often used interchangeably in everyday language — clinically they are two very different illnesses. Anyone wanting clarity during the Berlin cold and flu season gets a specialist assessment at a house call, including an influenza rapid test if appropriate and evidence-based treatment decisions. Daily 6 am to midnight, English-speaking, with GOÄ billing.
Medically reviewed by Susanne Reiche · Last reviewed
Influenza vs. cold — the clinical distinction
In everyday speech influenza and the common cold are often used interchangeably — medically they are clearly distinct. True influenza is a viral infection by influenza A or B with typically stormy onset: within a few hours sudden high fever above 38.5 °C, marked muscle and joint pain, headache, severe dry cough and a clear sense of being unable to function. Patients often describe being 'hit by a truck'. A common cold, in contrast, develops gradually over two to three days, with scratchy throat, runny nose, mild cough, slight rise in body temperature — and you usually remain functional.
Clinically this distinction matters because it changes therapy, the length of sick leave and how you behave around at-risk contacts. Influenza usually lasts 7 to 14 days, with residual fatigue often up to three weeks; a common cold is usually over in 5 to 7 days. Antiviral therapy (oseltamivir) is indicated for influenza within the first 48 hours for at-risk patients — for a common cold there is no specific antiviral therapy. We see you at home daily 6 am to midnight, run an influenza A/B rapid test when symptoms fit, and make an evidence-based diagnosis.
When a rapid test makes sense
An influenza A/B rapid test makes sense when the clinical picture fits (sudden high fever, muscle pain, dry cough) and the result would change treatment — that is, primarily for at-risk patients, pregnant women, people over 60, those with chronic lung or heart disease, the immunosuppressed. For younger healthy patients with mild course the diagnosis can usually be made clinically. The test is read in 15 minutes — sensitivity in the right timeframe is 70 to 90 percent.
When hospital is the right place
For acute shortness of breath, persistent chest pain, altered consciousness, oxygen saturation below 92 %, severe worsening of known COPD or heart failure or signs of pneumonia, call 112 immediately or seek admission. For young healthy adults with uncomplicated influenza or cold, outpatient care is standard. We measure oxygen saturation and respiratory rate at the house call and decide together.
How the differential diagnosis works at the house call
You call, describe the symptom course and severity. We discuss urgency and a time window — arrival in Berlin 60 to 90 minutes. If there are signs of emergency we stay on the phone until you are cared for or the ambulance arrives.
On site: structured history (onset, course, symptom intensity, comorbidities, vaccine status), physical exam with lung auscultation, oxygen saturation, temperature, influenza or strep rapid test if appropriate. Treatment decision, prescription, sick note. GOÄ invoice via the Privatärztliche Verrechnungsstelle.
Emergency? Dial the emergency number
If unconscious, with severe chest pain, breathlessness or heavy bleeding, dial 112 immediately. Our service complements the emergency services — it does not replace them.
Case profiles
Typical scenarios
Business traveller at the hotel
Manager with sudden high fever 24 hours before an important meeting. We test, diagnose influenza, write sick leave and advise on therapy.
Family with a feverish child
Parents unsure: influenza or cold. We examine the child, test if appropriate and advise on further care.
Older patient with comorbidities
At-risk patient with fever and cough. We test influenza, assess lung function and decide on antiviral therapy.
Young adult with mild symptoms
20-year-old with gradual cold. Clinically clear cold, no flu test indication, symptomatic therapy.
Frequently asked questions
Can I always distinguish influenza from a cold clinically?
Usually yes — the onset (sudden vs. gradual), the severity of general symptoms and the fever pattern give clear clues. In at-risk patients or unclear cases the rapid test brings clarity.
Is oseltamivir worthwhile in a healthy 30-year-old with influenza?
The benefit in young healthy adults is limited — illness duration is shortened by about a day. In at-risk patients the balance shifts clearly in favour of therapy. We decide individually.
How long is influenza contagious?
Typically from 24 hours before symptom onset to 5 to 7 days after — longer in children and the immunosuppressed. We advise on isolation and protecting at-risk contacts.
What if a new fever rises after a cold?
That is an important warning sign — possible bacterial superinfection (e.g. pneumonia, sinusitis, otitis). We re-examine and decide on antibiotic therapy by indication.