According to the information in the leaflet, it is not necessary to interrupt the treatment with Broncho-Vaxom, as it can be used as an adjunct during upper respiratory tract infections: "In the case of acute phase of respiratory tract infections, the medicinal product may be used concomitantly with appropriate treatments." If you suspect that the fever is the result of using a medicine and, for example, an allergic reaction, you should consult a doctor. On our website you can use a paid teleadvice in the e-visit tab: https://www.gdziepolek.pl/telekonsultacja/z-pediatra I encourage you to read the article: https://www.gdziepolek.pl/kategorie/nieswoiste-szczepionki-bakteryjne