The results show that influenza and other respiratory viruses are a major clinical, virological, and epidemiological problem. In the samples from the epidemic season of 2010–2011 in the I-MOVE project, the presence of the genetic material of influenza virus type A and B was detected in 81 cases, which represented 38.6 % of all samples investigated; the share held by the influenza virus type A/H1N1/pdm09 is shown in Fig. 2. In the remaining 71 positive samples, i.e., 33.8 %, the following respiratory viruses were detected: Human parainfluenza virus type 1–4, Human respiratory syncytia virus type A and B, Human coronavirus 229E/NL63 and OC43, Human rhinovirus type A, B, and C, Human enterovirus, and Human adenovirus.

In 23 (11 %) cases, a co-infection with two respiratory viruses was reported, which constitutes a serious clinical problem because of the lack of suitable, effective antiviral drugs. The neuraminidase inhibitors, such as oseltamivir and zanamivir, are suitable only influenza treatment. These drugs are not effective in preventing infections caused by other viruses in the respiratory system. The arrangement of co-infecting viral pairs detected is presented in Table 1.