The strategy of protecting young infants against RSV LRTI through delivery of RSV neutralizing antibodies is rooted in epidemiologic data demonstrating an association between neutralizing antibody titers and protection against RSV LRTI, and in the development of two products that have protected preterm infants against RSV LRTI: intravenous immunoglobulin containing high
titers of RSV-neutralizing antibodies (RSVIGIV), and an RSV F mAb (palivizumab) with potent neutralizing activity.
An essential concept in evaluating the safety of medical products is making the appropriate comparison to assess the potential risks and benefits.When compared to no vaccine, the benefits of vaccination with the Ad26.COV2.S vaccine far exceed the risks for all groups at this time. This is the key issue for much of the world, where the adenovirus-vectored vaccines are often the most (and in many cases the only) readily available option and will save many lives.
In an ongoing multinational, placebo-controlled, observer-blinded, pivotal efficacy trial, we randomly assigned persons 16 years of age or older in a 1:1 ratio to receive two doses, 21 days apart, of either placebo or the BNT162b2 vaccine candidate (30 μg per dose). BNT162b2 is a lipid nanoparticle–formulated, nucleoside-modified RNA vaccine that encodes a prefusion stabilized, […]
Live-Attenuated Respiratory Syncytial Virus Vaccine With M2-2 Deletion and With Small Hydrophobic Noncoding Region Is Highly Immunogenic in Children
A promising attenuation strategy involves deletion of most of the open reading frame (ORF) encoding the RNA synthesis regulatory protein M2-2. The RSV M2-2 protein is a small, nonabundant protein encoded by the second, downstream ORF in the M2 messenger RNA, which slightly overlaps the 5’ proximal, upstream M2-1 ORF
As the world rushes to develop new vaccines against Covid-19, there is a real risk that pregnant women and their babies will not be among those who are able to benefit from them.
Does respiratory syncytial virus lower respiratory illness in early life cause recurrent wheeze of early childhood and asthma? Critical review of the evidence and guidance for future studies from a World Health Organization-sponsored meeting
A long-standing question is whether RSV LRTI in early life causes subsequent recurrent wheeze of early childhood (RWEC) and asthma. The current evidence supporting a causal association between RSV and RWEC/asthma is mixed. To shed light on this important question, the World Health Organization (WHO) undertook three activities. The first comprised an analysis of the sample size required to estimate the potential impact of RSV prevention by vaccines or mAbs on the subsequent development of RWEC in RCTs. The second was a systematic review and meta-analysis that will be reported separately. Third was a convening of subject matter experts on February 12–13, 2019 in Geneva, Switzerland.
Shigella CHIMs are useful for evaluating potential therapeutics and vaccines. As this organism is increasingly recognized as a cause of morbidity and mortality, a vaccine is now a global health priority. The Shigella CHIM allows for rapid evaluation of vaccine efficacy for up- or down-selection of vaccine candidates. Opportunities have arisen to validate the model as a predictor for vaccine efficacy in the field.
Harmonization of Zika neutralization assays by using the WHO International Standard for anti-Zika virus antibody
During outbreaks of emerging viruses, such as the Zika outbreak in 2015–2016, speed and accuracy in detection of infection are critical factors to control the spread of the disease; often serological and diagnostic methods for emerging viruses are not well developed and validated. Thus, vaccines and treatments are difficult to evaluate due to the lack of comparable methods. In this study, we show how the 1st WHO International Standard for anti-Zika antibody was able to harmonize the neutralization titres of a panel of serological Zika-positive samples from laboratories worldwide.