Active clinical trials for "Malaria"

This is a clinical trial in which healthy volunteers will be administered one or two experimental malaria vaccines. The vaccine R21 will either be administered alone or in combination with the adjuvant vaccine Matrix-M1. All vaccinations will be administered intramuscularly. Each volunteer will receive three vaccinations in total. There are three different vaccine schedules: Group 1 will receive 10µg of R21 mixed with 50µg of Matrix-M1 on days 0, 28, and 56. Group 2 will receive 50µg of R21 on days 0, 28, and 56. . Group 3 will receive 50µg of R21 mixed with 50µg of Matrix-M1 on days 0, 28, and 56. The study will assess the safety of the vaccines, and the immune responses to the vaccinations. Immune responses are measured by tests on blood samples. Healthy adult volunteers will be recruited in Oxford and London, England.

Randomized controlled single blind prospective comparative study.

The study is a single centre, randomised, placebo-controlled, double-blind study with DSM265 including up to two cohorts of healthy male and female volunteers aged 18 to 45 years. The study will be conducted into two sequential parts (Cohort 1 and Cohorts 2a and 2b).

The present trial will evaluate safety and tolerability as well as the vaccine-induced humoral and cellular immune responses in healthy Tanzanian adults, adolescents, children, and infants who receive doses of 1.8x10^6, 9.0x10^5, 4.5x10^5 or 2.7x10^5 PfSPZ of PfSPZ Vaccine by direct venous inoculation (DVI),compared with control groups receiving normal saline (NS) placebo by DVI. In addition, as an exploratory objective, controlled human malaria infection (CHMI) will be used to assess efficacy in adults three weeks following immunization.

This study will be conducted in Siaya County in Nyanza Province, western Kenya. Healthy children aged 5 months through 9 years of age living within approximately 10 km of the study clinic(s) (Siaya County Referral Hospital, or Wagai dispensary, a government health facility in Wagai division) will be eligible for participation in Part 1; healthy infants aged 5 months - 12 months inclusive will be eligible for Part 2.

This phase I trial of the replication-intact PfSPZ Challenge vaccine given under CQ cover will enroll 28 healthy volunteers to receive PfSPZ or placebo, as well as suppressive doses of chloroquine (CQ)on varying schedules. 10 weeks post 3rd immunization subjects will be subjected to controlled human malarial infection. The primary objective of this study is to evaluate the safety and tolerability of escalating doses of Sanaria PfSPZ Challenge administered by DVI on varying schedules to healthy malaria-naïve adults taking suppressive doses of CQ (PfSPZ-CVac).

This will be a double-blinded randomized controlled phase III trial of 782 HIV uninfected pregnant women and the children born to them. HIV uninfected women at 12-20 weeks gestation will be randomized in equal proportions to one of two intermittent preventive treatment in pregnancy (IPTp) treatment arms: 1) monthly sulfadoxine-pyrimethamine (SP), or 2) monthly dihydroartemisinin-piperaquine (DP). Both interventions arms will have either SP or DP placebo to ensure adequate blinding is achieved in the study. Follow-up for the pregnant women will end approximately 6 weeks after giving birth. All children born to mothers enrolled in the study will be followed from birth until they reach 12 months of age.

Study to evaluate the efficacy of DSM265 as a causal prophylactic in a standardized and validated Human Challenge model using direct venous inoculation of aseptic, purified, cryopreserved, vialed Plasmodium falciparum sporozoites.

The purpose of this study is to determine whether an investigational malaria vaccine is safe and induces an immune response against malaria when tested in adults living in the United States.

The overall aim of this study is to determine the effectiveness of two rounds of mass drug administration (MDA) with dihydroartemisinin-piperaquine (DHAp) + single low dose (SLD) primaquine for reducing seasonal malaria transmission in Shehias considered hotspots on Unguja Island, Zanzibar.