The article considers the issues of therapeutic management of patients with so-called "difficult" pneumonia, particularly, patients with diagnosed syndrome slowly resolving / nonresolving pneumonia, who do not respond to the treatment. The reasons and significant risk factors potentially affecting the effectiveness of therapy are analyzed, the therapeutic tactics of managing patients with no "response to treatment" are considered, the list of necessary diagnostic methods and directions of antibiotic therapy is updated. The article analyses the tactics of managing patients with pneumonia during a pandemic caused by SARS-CoV-2 coronavirus. It also provides directions of diagnostics with priority discussion of biological markers of the inflammatory response as well as antimicrobial therapy strategy.