Active clinical trials for "Chickenpox"

The purpose of this study is to determine the seroprevalence of Hepatitis A Virus (HAV), Varicella-Zoster virus (VZV), Cytomegalovirus (CMV), Herpes Simplex (HSV) and Bordetella pertussis (BP)infections in Mexico.

This an open phase Ⅳ clinical trial of live attenuated varicella vaccines manufactured by Sinovac (Dalian) Vaccine Technology Co., Ltd .The purpose of this study is to evaluate the immunity persistence of live attenuated varicella vaccine at 5 and 8 years after primary immunization with live attenuated varicella vaccine.

Background: The common varicella-zoster virus causes both chickenpox and shingles. Both diseases cause rashes, but they can also have complications such as bacterial infections of the skin, pneumonia, or eye disease. By drawing and studying blood samples from people who have been infected with the varicella-zoster virus or who are receiving or have received the varicella vaccine, researchers hope to learn more about the immune system s response to the virus. Objectives: - To determine the immune system s response to the varicella virus, either in its existing form or given as part of a vaccine. Eligibility: Individuals 18 years of age and older who have had or are receiving the varicella vaccine. Individuals 5 years of age and older who currently have chickenpox or shingles. Design: Participants will visit the NIH Clinical Center for an initial physical examination, and will provide blood samples for evaluation. Researchers will determine the number of samples to be taken and the amount of blood to be drawn as needed based on the participants medical history and exposure to the varicella-zoster virus. Investigators in this study will not be giving subjects either the chickenpox or shingles vaccine. They will only be looking at the response to the vaccine in persons who are receiving or have received the vaccine from their health care provider.

This study is to assess VariZIG™ for the treatment of patients at risk for developing serious complications from chicken pox.

To compare the sensitivity of Tzanck smear with methylene blue stain versus traditional Giemsa stain in patients with herpes infection.

Herpes simplex virus, cytomegalovirus and varicella zoster virus infection are purported to play a pivotal role in morbidity and mortality in burns. Thus far, there is no existing systematic review (Level of Evidence III or higher) describing the unique role as well as concurrent infections of these viruses in burns. The aim of this review is to point out the clinical differences between these human herpes virus subtypes, to outline established therapy approaches, and to provide evidence for virus related morbidity and mortality in burns.

Among patients with thunderclap headache who were admitted to the four participating hospitals, who has diffuse segmental vasoconstriction on CT angiography or MR angiography will be eligible for the study. Participants who meet the definition of RCVS will be enrolled as the case-patients and others will be enrolled as control-patients. The RCVS group will be defined when two or more neurologists agree by the clinical features and angiographic findings. The result of tests for varicella zoster virus titer will not be opened to neurologists until the end of the study. For case and control patients, tests for varicella zoster virus infection are (1) Pre-existing virological markers (ex. VZV-IgG, IgM, and VZV PCR in CSF or Skin lesion if present) (2) VZV-specific cell mediated immune response (CMI) at the time of admission and one month later (3) VZV in blood measured by quantitative test of viral load with real-time PCR and digital PCR for latent viral load (4) Quantitative test of viral load with real-time PCR in saliva at time of admission and one month later. Reactivation or infection of VZV of patients with RCVS and controls will be compared.