China's Vaccine road trip
With few COVID-19 cases at home, Chinese vaccinemakers have had to test the worth of their candidates abroad and four are in efficacy trials in 15 countries.
The two other Chinese players, Sinovac Biotech and China National Biotec Group (CNBG)—a subsidiary of one of the world’s largest vaccinemakers, the state-owned Sinopharm—are taking a different approach: vaccinating people with the whole, “killed” virus. This requires no sophisticated protein or RNA design or genetic engineering: Scientists simply inactivate the virus with a chemical (beta propiolactone) and mix it with an adjuvant (alum) that effectively puts the immune system on full alert by irritating it. In theory, such vaccines can produce broader antibody and T cell responses, because they contain the full set of viral proteins, rather than a single one such as spike. And unlike mRNA vaccines, which have to be stored at subzero temperatures, inactivated viruses requires no more than ordinary refrigeration.
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By John Cohen
Refana Inc., is United States registered private corporation dedicated to finding practical and innovative solutions to the world's medical problems. By utilizing a highly collaborative open source system of research and development Refana has been able to attract world leaders in their respective scientific and medical fields to work on these problems. Through this model Refana hopes to greatly accelerate the vaccine development process for Covid-19 and help protect not only the health of the world, but also the economies and stability of nations at risk.