Breakthroughs Blog: Zika

In recognition of World Mosquito Day on August 20, 2023, GHTC is testing our readers’ knowledge of mosquito-borne diseases and ongoing efforts to develop treatments, vaccines, vector-control innovations, and other tools to outsmart the world's deadliest animal. Test your knowledge by taking the quiz below!

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.The World Health Organization (WHO) recently warned about the limited pipeline of new antibiotics for drug-resistant bacteria in a report based on a review published by WHO in 2022. The report found that only 12 new antibiotics entered the market between 2017 and 2021. Additionally, the report found that although 27 experimental antibiotics for critical bacterial infections are in clinical development, only 6 of those are considered different enough from existing antibiotics to potentially be used against drug-resistant pathogens without concern. Without a steady stream of novel antibiotics entering the pipeline and market, bacterial infections will become increasingly dangerous as bacteria continues to develop resistance to existing drugs.A new study from researchers at HDT Bio found that a new type of RNA vaccine against HIV and the Zika virus generated strong antibody responses in pregnant rabbits and their offspring. More studies will be necessary to confirm that vaccinating the mother alone is enough to protect against infection in the offspring, as well as to optimize vaccination timing and to see if the results can translate to humans. If successful, the vaccine could be an important tool in preventing mother-to-child transmission of these viruses and reducing the disease burden in newborns.A new study from researchers at Johns Hopkins University School of Medicine, supported by the US National Institutes of Health, found that HIV can persist in myeloid cells, a subset of white blood cells, in people who have been virally suppressed for years through antiretroviral therapy. The researchers emphasized that these findings challenge the long-held idea that these cells are short-lived, proving instead that these cells may contribute to an HIV reservoir and could be an important target in the development of a cure. Larger studies with more diverse participant pools will be needed to identify the proportion of people who show latent HIV in myeloid cells, as well as the mechanisms that replenish this reservoir over time.

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 study published last week found that an experimental influenza vaccine that uses messenger RNA (mRNA) technology protected against all known flu subtypes in animals. If found to be successful in humans, the universal vaccine, which would serve as a supplement to annual flu shots, could prepare the immune system to better respond to new flu viruses, reducing the likelihood of severe disease and death. These promising results come after years of efforts to develop a universal flu vaccine. While human trials are expected to begin soon, challenges including potential low tolerability of the mRNA vaccine will need to be addressed before the candidate can progress.A recently published study estimated that approximately 7.7 million people were killed by bacterial pathogens in 2019—the second leading cause of death globally that year. More than half of these deaths resulted from five pathogens: Staphylococcus aureus, Escherichia coli, Streptococcus pneumoniae, Klebsiella pneumoniae, and Pseudomonas aeruginosa. While the highest mortality rates occurred in sub-Saharan Africa, disproportionately high burdens are present throughout low- and middle-income countries, which could be linked to inadequate access to effective antimicrobials (which exist for all the bacteria investigated in the study), among other structural challenges. Despite the high burden of deaths associated with bacterial pathogens, they receive much less funding and attention compared to other diseases. These data underline the need for greater investment into a variety of interventions and innovations, including vaccine candidates, that can address drug-resistant bacterial pathogens.A recent study determined that an antibody (DH1017.IgM) found in pregnant women who were infected with Zika but did not pass the virus to their fetuses can protect mice from the virus and suppress it to an undetectable state in their blood. The study, which began during the 2015 Brazilian Zika outbreak, could lead to the use of the antibody as a therapeutic agent and prophylactic to protect at-risk patients during an outbreak. The research team is working next to discover whether the antibody can prevent transmission from pregnant mice to their offspring and hoping to progress to human trials that include pregnant individuals who are often excluded from drug trials. Preclinical research into other vaccine candidates for Zika are also underway.

In recognition of World Mosquito Day on August 20, 2021, GHTC is testing our readers’ knowledge of mosquito-borne diseases and ongoing efforts to develop treatments, vaccines, vector-control innovations, and other tools to outsmart the world’s deadliest animal. Find out if you have achieved mozzie mastery by taking our quiz below. 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