Active clinical trials for "Virus Diseases"

This is a post-licensure safety observation cohort study to describe the general safety of GARDASIL™ (a quadrivalent human papillomavirus vaccine) in males.

The purpose of this study is to investigate the immune responses associated with Epstein-Barr virus infections, and to find out the possible immunodeficiency that may be linked to severe Epstein-Barr virus infections.

The primary objective of study will be to evaluate the effectiveness of interferon-free direct acting antivirals (IFN-free DAAs) in the treatment of chronic hepatitis C virus (HCV) among patients in opioid-substitution treatment (OST). We hypothesize that rates of sustained virological response will be comparable to non-OST populations. Secondary objectives include the evaluation of safety data, patients' adherence and patient reported outcome measures like functioning (disability), satisfaction with the treatment, health status, general health perceptions and health-related quality of life.

This study evaluates the use of Kagocel for the prevention of acute respiratory viral infections (ARVI) and influenza during the epidemic rise in the incidence of diseases in Russia in 2018 (epidemiology: the number of cases during the period of Kagocel administration and follow-up, bacterial exacerbations, the number of repeated episodes (reinfection), demographics of patients, safety, adherence to treatment) in students at risk due to stress, lack of sleep and fatigue.

The aim of the research is to estimate the levels of cellular and humoral immunity to the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) among Moscow residents over 18 years old. During the study, participants will be divided into four groups: healthy volunteers; individuals recovered from coronavirus disease 2019 (COVID-19) with different severity; individuals vaccinated against SARS-CoV-2; individuals who have had COVID-19 concomitantly with comorbidities that characterized by the impact on the immune system (tuberculosis, chronic obstructive pulmonary disease, HIV infection, hematological neoplasia). For all participants included into the study peripheral blood will be collected and the titers of SARS-CoV-2 specific immunoglobulins M (IgM) and immunoglobulins G (IgG), frequencies of the T cells specific to nucleocapsid (N), membrane (M), and spike (S) proteins of SARS-CoV-2 in peripheral blood, as well as the fractions of virus specific T helpers and cytotoxic T cells will be estimated. For smaller cohorts of the participants in all groups the antibody titers and T cell response levels will be examined in dynamics. All participants will be monitored for the incidence of primary or repeated COVID-19 for 1-2 years after inclusion in the study. Based on the results of the study, the relationship between the formation of humoral and cellular immunity against COVID-19, the duration of these types of immunity, as well as their individual contribution to protection against primary or secondary SARS-CoV-2 infection will be analyzed. Additionally, data concerning patients recovered from COVID-19 and having concomitant diseases will provide a valuable information that may help to understand in more details the mechanisms of the development of the SARS-CoV-2 specific immune response.

The study was designed to gather information regarding the use of palivizumab for the prophylaxis for respiratory syncytial virus (RSV) infection in high-risk infants in selected countries within Latin America.

The main objective of this study is to assess whether a recently-developed bioassay for the protein FGL2 can be used to predict the progression and/or response to treatment of Hepatitis C Virus disease in patients with chronic HCV infection. The hypothesis is that increased levels of FGL2 and increased numbers of T regulatory cells are associated with a failure to respond to treatment.

A five-month-old healthy girl who presented with painful herpetic gingivostomatitis and perioral vesicles.

Wearing face coverings in enclosed public spaces is a key public health measure to limit viral spread during the 2020 Covid-19 pandemic. Health psychologists are interested in developing interventions that can increase the likelihood of health-adherent and protective behaviours being consistently undertaken at a general population level. Mental imagery interventions are one way in which behavioural scientists and health psychologists try to encourage behaviour change. Mental imagery involves thinking about, and then writing about, anticipated positive outcomes or key practical requirements of a defined health-related action (e.g. 'moderate alcohol consumption'; 'engaging in regular physical activity'). For this project, the investigators are exploring a mental imagery intervention created to encourage regular and consistent wearing of face coverings in public places where this is currently required in the UK. The investigators will test whether engaging in a mental imagery exercise results in any improvement in wearing a face covering (or intention to wear a face covering) one month later relative to reading a public health message about face coverings. In addition, the investigators will explore belief-based and personality-related factors that might make a difference to the effectiveness of the mental imagery intervention.

Randomized, 2-arm observational study. The 2 arms (randomized at the level of health care provider) will be: 1. usual practice; 2. automated reminders to recommend 2nd and 3rd doses of HPV vaccine for eligible male and female adolescents who have initiated vaccination.