The large-scale use of mRNA-based COVID-19 vaccines including those produced by Pfizer and Moderna may contain unknown risks, Chinese experts warned, and called for the cautious use of such vaccines following the death of a patient in the US.
A Beijing-based immunologist, who requested anonymity, told the Global Times on Monday that some components in mRNA vaccines, such as polyethylene glycol (PEG), have not been used in vaccine production before, and it is no surprise to see allergic reactions in some people. The liposome physical properties of the vaccine also carry the risk of causing abnormal immune
function disorders.
He called on suspension of the use of the mRNA COVID-19 vaccines on the elderly and people with underlying diseases, as this new technology has not proven to be safe in large-scale use. Previously, Norway reported the deaths of 23 elderly Norwegian people who received mRNA-based COVID-19 vaccines. All the deaths occurred in frail, elderly patients in nursing homes. All were over 80 years old and some of them over 90, Norwegian media NRK reported.
Read more at:Caution needed in using mRNA-based vaccines to prevent unknown risks including death - Global Times
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