How is influenza different from a common cold?
There is no absolutely reliable “home” way to distinguish them; the diagnosis is confirmed by a test. But the set of symptoms is characteristic enough to suspect the flu and seek help in time.
- Onset: with influenza sudden, literally within an hour; with ARVI, gradual, over a day or two
- Temperature: with flu 38.5–40 °C with chills, lasts 3–5 days; with ARVI, more often up to 38 °C and not for long
- Muscles and joints: with the flu, there is severe aching, weakness such that it is difficult to get up; with ARVI, slight malaise
- Headache: with flu, severe, with pain when moving the eyes; with ARVI moderate
- Nose: with the flu, it is dry in the first days, a runny nose appears later; with ARVI, runny nose from the very beginning
- Cough: with flu, dry, painful, often with pain in the chest; with ARVI it is milder, appears on the 3rd–4th day
- Recovery: After the flu, weakness and fatigue may last 2-3 weeks.
The practical conclusion from this comparison is simple: if the illness began suddenly and severely, you need to see a doctor on the same day, and not “see what happens by the weekend.” It is on the first day that the decision on antiviral therapy makes sense, and the examination allows you to assess the risk of complications taking into account age and chronic diseases.
How to make a diagnosis
Most cases are diagnosed clinically and not all require laboratory confirmation. The test changes tactics where the decision depends on it: whether to prescribe an antiviral drug, whether to hospitalize the patient, whether to isolate the sick person in a family where an infant or an elderly person lives.
- Осмотр и оценка эпидемиологической ситуации: в разгар сезонного подъёма типичная картина сама по себе достаточно убедительна.
- ПЦР мазка of носоглотки — наиболее точный метод, различает грипп A, грипп B и другие респираторные вирусы.
- Экспресс-тест на антиген гриппа — результат за 15–20 минут, но менее чувствителен, отрицательный ответ не исключает болезнь.
- Общий анализ крови — помогает заподозрить бактериальное осложнение.
- Рентгенография или КТ грудной клетки — при одышке, боли в груди, подозрении на пневмонию.
- Пульсоксиметрия — простое измерение насыщения крови кислородом, которое быстро выявляет угрожающее состояние.
Treatment: what works and when
The mainstay of therapy for most people is rest, adequate fluids, and antipyretics. Specific antiviral drugs that act on the influenza virus are prescribed by the doctor, and time is critical here.
- Antiviral drugs block the exit of new viral particles from the cell, so they only make sense while the virus is actively multiplying - this is the first 48 hours, or better yet the first day
- Late initiation of therapy is justified only in severe and hospitalized patients, and this is the doctor’s decision
- Antibiotics are not prescribed for uncomplicated influenza: the virus is insensitive to them in the same way as other respiratory viruses
- An antibiotic is added only if there is a bacterial infection - most often pneumonia, sinusitis or otitis media
- Acetylsalicylic acid is contraindicated for children and adolescents with influenza due to the risk of Reye's syndrome - severe damage to the liver and brain
Separately about the “second wave”: if after several days of improvement the temperature rises again, the cough intensifies and purulent sputum appears - this is a classic picture of bacterial pneumonia after the flu, and you need to see a doctor immediately, and not wait until the weekend.
Who is at risk for severe disease?
A healthy adult usually experiences the flu severely, but without consequences. Complications are concentrated in fairly clearly defined groups, and it is to them that vaccination, early prescription of antiviral drugs, and an insistent recommendation not to carry the disease on your feet are primarily addressed.
- Pregnant women, especially in the second and third trimester
- Children of the first five years of life, especially up to two years of age
- People over 65 years old
- Patients with bronchial asthma and chronic obstructive pulmonary disease
- Patients with diabetes mellitus, chronic kidney disease, severe obesity
- People with heart disease, previous heart attack, heart failure
- Patients with reduced immunity: cancer patients receiving chemotherapy, people with HIV infection and more
Vaccination: answers to common objections
The flu shot is surrounded by perhaps the densest cloud of myths of all vaccines. Let's look at typical objections in order - almost every one has a simple and verifiable answer.
- «От прививки заболевают». Современные инактивированные вакцины не содержат живого вируса и вызвать грипп не могут. Лёгкая болезненность в месте укола и недомогание на сутки — это ожидаемая реакция иммунной системы, а не болезнь.
- «Я привился и всё равно заболел». Вакцина не даёт стопроцентной защиты, но существенно снижает вероятность тяжёлого течения, госпитализации и осложнений. Кроме того, под гриппом часто понимают любую ОРВИ, от которой прививка и не защищает.
- «Состав каждый год другой — значит, ненадёжно». Наоборот: состав ежегодно обновляется под циркулирующие штаммы, поэтому и требуется ежегодная прививка.
- «Лучше переболеть и получить естественный иммунитет». Иммунитет после diseases узкий и недолгий, а цена — риск пневмонии и госпитализации.
- Оптимальное время прививки — до начала сезонного подъёма, обычно осенью: защитный уровень антител формируется примерно за две недели.
Home care and protection of loved ones
Most people suffer from the flu at home, and the speed of recovery and whether the whole family gets sick depends on how this period is organized. Separately, it is worth mentioning about work: having the flu on your feet not only gives more complications, but also turns the office or classroom into a hotbed of infection.
- Drink enough fluids: at high temperatures, water loss increases noticeably
- Do not lower the temperature at any cost, but lower it if you feel unwell and always in people with heart disease
- Ventilate the room - the concentration of the virus in the air of a closed room increases
- Stay at home throughout the feverish period and for at least a day after the temperature normalizes
- Use separate utensils and towels, cover your mouth when coughing with your elbow
- Especially protect from contact with pregnant women, the elderly and people with chronic diseases