Caution should be used when using mRNA vaccines to avoid unknown risks, including death



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vaccine Photo: VCG

The large-scale use of mRNA-based COVID-19 vaccines, including those produced by Pfizer and Moderna, may contain unknown risks, Chinese experts have warned, and have called for careful use of these vaccines after the death of a patient in the United States.

Unlike inactivated vaccines, the large-scale use of mRNA vaccines carries the risk of causing abnormal immune dysfunction, allergy, or even death, especially in the elderly and those with underlying diseases, said the Chinese immunologist, while some observers call for more investigation into the death before drawing the conclusion that mRNA vaccines are not safe.

The patient, from Placer County, Calif., Died hours after receiving a coronavirus vaccine, raising concerns about the safety of mRNA vaccines, although Placer County officials have rejected the link between the person’s death and the vaccine, KTLA reported.

Authorities have not disclosed where the patient received the vaccine and what vaccine was used in this particular case, according to the report.

The vaccines the county received were likely the Pfizer-BioNTech COVID-19 or Moderna COVID-19 vaccine, as both had been authorized in the United States. Both are mRNA vaccines.

California authorities are investigating the cause of death.

A Beijing-based immunologist, who requested anonymity, told the Global Times on Monday that some components of mRNA vaccines, such as polyethylene glycol (PEG), had not previously been used in vaccine production, and it not surprisingly to see allergic reactions in a few people. The liposomal physical properties of the vaccine also carry the risk of causing abnormal immune function disorders.

MRNA vaccines teach human cells to make a protein to trigger an immune response, which can then protect people from infection if the real virus enters the body.

He called for the suspension of the use of COVID-19 mRNA vaccines on the elderly and people with underlying illnesses because this new technology has not been shown to be safe in large-scale use.

Previously, Norway had reported the deaths of 23 elderly Norwegians who had received mRNA-based COVID-19 vaccines. All of the deaths occurred in elderly and frail patients in nursing homes. All were over 80 and some over 90, Norwegian media NRK reported.

However, Lü Mengtao, a medical industry observer, told the Global Times on Monday that the reported death may not be directly related to vaccines which must be carefully evaluated so that the mRNA vaccine deemed dangerous is not made irrational. .

The Observer suggested that people with pre-existing illnesses, the elderly and those with vulnerable immunity not be injected with such vaccines.

Even for inactivated vaccines with more mature technology, it is not advisable for high-risk groups such as the elderly and people with underlying diseases to be administered immediately.

Global Times

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