Breakthroughs Blog: Vaccines

Interested in more global health innovation news? Every week GHTC scours media reports worldwide to deliver essential global health R&D news and content to your inbox. Sign-up now to receive our weekly R&D News Roundup email. A 12-month pilot research study conducted in rural Zambia found that administering a suppository form of a malaria-fighting drug to children without immediate access to a health facility drastically cut the number of child deaths caused by the disease. During the pilot, child deaths related to severe malaria were cut from eight percent to 0.25 percent. There were only three child deaths during the study period—94 fewer than would be expected in the same time frame, according to Medicines for Malaria Venture, one of the study’s research partners. During the pilot, all children suspected of having severe malaria were given the suppositories as a pre-referral treatment. This form of drug offers advantages as it can be administered even if a child is unconscious or vomiting. Children who received the suppository were then transferred to a health facility where they were given injectable artesunate malaria medication, followed by a three-day oral antimalarial treatment course. Researchers hope this model can be replicated in other rural settings where there is a high prevalence of malaria and limited access to health workers. Johnson & Johnson (J&J) unveiled promising early-stage results for a tetravalent mosaic-based HIV preventative vaccine regimen. This announcement follows a large-scale efficacy study J&J launched last November to test the tetravalent vaccine regimen in five sub-Saharan African countries. In this early-stage study, known as TRAVERSE, a vaccine regimen including the tetravalent vaccine candidate—which targets four strains of the HIV virus—was found to broaden immune responses to different HIV-1 strains when compared to the trivalent, or three-strain, version. J&J is conducting the TRAVERSE study in 200 patients in the United States and Rwanda. Study participants will receive two prime doses of either vaccine, followed by two boosters at weeks 24 and 48. These initial results are from after week 28, or after the first boost. J&J said findings from the TRAVERSE study were critical to the company’s decision to start the large-scale efficacy testing. In a clinical trial conducted in Belarus, a new treatment for a drug-resistant strain of tuberculosis (TB)—bedaquiline—administered alongside other antibiotics, was found to cure 80 percent of individuals. Of the 181 trial participants given the drug regimen, 168 completed the course and 144 were cured. The Belarus cure rate was largely replicated in bedaquiline trials in other nations in eastern Europe, Africa, and Southeast Asia. According to the World Health Organization, cases of multidrug-resistant TB have been reported in at least 117 countries around the world with only 55 percent of people treated successfully.

One of the great things about working at GHTC is that every day we get to read stories about incredible innovations in global health. Most of the technologies we read about are inventive, some are revolutionary, and a few are so unusual, one might think they were ripped from the pages of a science fiction novel. So, to enjoy a bit of fun and mischief this Halloween, we’ve created a new game, TRICK or TREATment, to test our readers’ knowledge of global health technologies. For each question, we will present a description of a global health technology. Choose TREATment if you believe this innovation exists and has market approval. Choose TRICK if you think we are trying to pull one over on you and, instead, the product is still in development or just a figment of our imagination.  Loading... (function(i, s, o, g, r, a, m) { var ql = document.querySelectorAll('A[quiz],DIV[quiz],A[data-quiz],DIV[data-quiz]'); if (ql) { if (ql.length) { for (var k = 0; k

Interested in more global health innovation news? Every week GHTC scours media reports worldwide to deliver essential global health R&D news and content to your inbox. Sign-up now to receive our weekly R&D News Roundup email. In a new report, researchers at the Johns Hopkins Center for Health Security highlight 15 promising technologies that could help make the world better equipped to fight emerging infectious disease (EID) outbreaks and prevent such outbreaks from becoming catastrophic events. The list includes innovative solutions from vaccines that spread through populations like viruses to 3D printed drugs. The 15 technologies identified in the report fall under five broad categories—disease detection and surveillance, diagnostics, manufacture of pharmaceuticals, administration of vaccines and drugs, and medical care—and range in use from the early detection of an EID, to preventing its spread, and through to the care of patients. Notably, researchers looked for innovations that could be used in developing countries where EID outbreaks “hit first and hit hardest,” according to Dr. Crystal Watson, lead author of the report.  A novel synthetic DNA vaccine candidate against Ebola, which targets the virus’ surface, offered complete protection from the Zaire strain of the Ebola virus in preclinical research. Importantly, the vaccine candidate also demonstrated durability, showing strong immune responses one year after the last dose—a particularly challenging area for Ebola vaccines. Compared to traditional vaccine approaches that involve injection into muscle, synthetic non-viral–based DNA vaccines can be administered directly into the skin, resulting in consistent, potent, and rapid immunity. The antibody levels resulting from this vaccine candidate were equal to or higher than those for other vaccines currently being evaluated in the clinic at the Wistar Institute Vaccine & Immunotherapy Center, where the research was conducted. One researcher noted the success of an intradermal, low-dose regimen as encouraging in the pursuit to create safe and effective vaccines that are optimized for high-risk areas. A new type of malaria vaccine, known as a transmission-blocking vaccine (TBV), which aims to prevent mosquitoes from becoming infected by malaria parasites when feeding on infected humans, could one day become part of a suite of tools used to combat malaria. While traditionally scientists have focused on developing vaccines that prevent malaria infection from developing after a person is bitten with a parasite-carrying mosquito, a TBV works differently. A TBV signals the human body to begin making anti-malaria antibodies that will be passed to the mosquito when it bites the immunized person, disrupting the transmission cycle between mosquitoes and humans. While a TBV would not directly prevent an immunized person from getting infected, it would reduce the likelihood of people in that community becoming infected. A research team supported by the PATH Malaria Vaccine Initiative, the University of Buffalo and others have shown that the TBV approach could be effective. The researchers found that antibodies from a protein called Pfs25 effectively blocked the development of malaria-causing parasites in the gut of mosquitoes in animal studies.

Interested in more global health innovation news? Every week GHTC scours media reports worldwide to deliver essential global health R&D news and content to your inbox. Sign-up now to receive our weekly R&D News Roundup email. Rotasiil, a first-of-its-kind thermostable vaccine to prevent rotavirus—the most common cause of severe diarrheal disease in children worldwide—has achieved prequalification from the World Health Organization. This status will allow United Nations agencies and other organizations to procure the vaccine at low-cost for use in low- and middle- income countries. Developed by the Serum Institute of India with clinical trial and licensure support from PATH, Rotasiil is an oral vaccine administered to infants in a three-dose course, which does not require refrigeration—making it easily distributable in places where power shortages and failures can disrupt the cold chain necessary to keep traditional vaccines viable. Rotasiil is the fourth rotavirus vaccine on the market, and the second developed by an Indian organization. Japanese company Kansai Plascon has launched the world’s first mosquito repellent paint in Zambia. The paint technology, which has shown to be safe in humans, disrupts the nervous system of a mosquito upon contact, reducing its ability to remain on walls where the paint has been applied. “The knock-down effect lasts for up to two years, offering lasting protection from malaria infection and other mosquito-borne diseases,” Kansai said. Mosquito repellent paint offers a new tool in the arsenal to fight malaria—one of the world’s deadliest diseases—alongside other anti-malarial measures such as bednets, prophylactics, and insecticide spraying. The Office of the Assistant Secretary for Preparedness and Response (ASPR) and the Defense Advanced Research Projects Agency (DARPA) has launched a new partnership to strengthen the health security of the United States by focusing on the research, development, and deployment of medical countermeasures and advanced technologies to combat these threats. ASPR and DARPA will focus on two initial areas of collaboration—bacterial pathogens to combat microbial threats and the discovery of molecular biomarkers. ASPR’s Biomedical Advanced Research and Development Authority (BARDA) and DARPA will conduct preclinical and clinical trials of a new type of therapeutic for antibiotic resistant bacteria with an aim to develop a product that mitigates the effects of multidrug-resistant infections. BARDA and DARPA will also focus on discovering and validating biomarkers—which define a person’s exposure to a virus before the person shows symptoms of infection—and developing tests that can identify infected patients quickly to help contain disease outbreaks. Through the partnership, ASPR and DARPA will increase collaboration and share data—maximizing the impact and investment of both agencies.