David Salisbury

Nota: Este archivo abarca los artículos publicados por el autor desde el 1 de Abril de 2008. Para fechas anteriores realice una búsqueda entrecomillando su nombre.

Researcher in Brazil working on virus replication in order to develop a vaccine against the coronavirus. Photo by DOUGLAS MAGNO/AFP via Getty Images.

When the H1N1 influenza pandemic struck in 2009, some industrialized countries were well prepared. Many countries’ preparedness plans had focused on preparing for an influenza pandemic and based on earlier alerts over the H5N1 ‘bird flu’ virus, countries had made advanced purchase or ‘sleeping’ contracts for vaccine supplies that could be activated as soon as a pandemic was declared. Countries without contracts scrambled to get supplies after those that already had contracts received their vaccine.

Following the 2009 pandemic, the European Union (EU) developed plans for joint-purchase vaccine contracts that any member state could join, guaranteeing the same price per dose for everyone.…  Seguir leyendo »

On 10 January 2020, Chinese scientists released the sequence of the COVID-19 genome on the internet. This provided the starting gun for scientists around the world to start developing vaccines or therapies. With at least 80 different vaccines in development, many governments are pinning their hopes on a quick solution. However, there are many hurdles to overcome.

Vaccine development

Firstly, vaccine development is normally a very long process to ensure vaccines are safe and effective before they are used.

Safety is not a given: a recent dengue vaccine caused heightened disease in vaccinated children when they later were exposed to dengue, while Respiratory Syncytial Virus vaccine caused the same problem.…  Seguir leyendo »