According to ENT doctor Vladimir Zaitsev, at an early stage, the symptoms of coronavirus infection manifest themselves as rhinopharyngitis: there may be sensations of sore throat or nasal congestion.
br>In an interview, Zaitsev stressed that it is difficult to recognize coronavirus infection today in the sense that the infection can give the impression of an ordinary seasonal ailment. “Omicron”, which is infected in a new wave, does not cause a serious condition and sensations at the initial stage.
“Covid comes, and a person thinks that he has a runny nose, a throat. As if the acute respiratory disease has joined, autumn, the weather has deteriorated, ”said the doctor.
Zaitsev continued in a conversation with Ura.ru: when infected with a coronavirus, a symptomatic picture may initially occur, as with rhinopharyngitis. But then the process descends to the level of the laryngopharynx, the voice begins to “heavier”. The next stage is the appearance of a cough. In this case, sputum is usually not secreted, and if it does appear, then in a meager amount and a green tint.
The doctor added that the Omicron strain had acquired an “interesting feature” –
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“a person is in a good mood, despite the general physical malaise.”
There may be a misleading impression that the sick person can work, since there is no great weakness and apathy. However, due to general intoxication, the body cannot cope with workloads.
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Earlier, the MedikForum.ru portal wrote about the conditions under which it is urgent to call an ambulance : 
Vladimir Zaitsev Health ENT- doctor of the highest qualification category, candidate of medical sciences