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China Covid Outbreak: Experts Urge Caution On The Use Of Sinovac Nasal Spray

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China Covid

China Covid

Chinese research on the efficacy of nasal antibody spray against Covid infection claimed an 80 percent prevention rate. However, reports citing experts urged caution, saying that nasal antibody spray has side effects. During the COVID-19 outbreak in November, thousands of health workers were recruited in Inner Mongolia for the study. According to a paper posted into the preprint server medRxiv, those who used the nasal antibody spray twice a day were infected at about one-fifth the rate of those who did not. 

The spray was developed by Sinovac Life Sciences and contained a broad-spectrum antibody known as SA58 to neutralize Covid. During the study, about 1,800 adverse events were reported, including runny or dry noses and sneezing. The authors, however, claimed that the adverse events “were all mild and disappeared quickly without affecting daily work.”

“This clinical study of the SA58 nasal spray on medical personnel showed good tolerance and good effectiveness for preventing Covid-19 infections, suggesting further application in other populations in the real world,” they added.

The nasal spray was given to about half the players, who were told to apply it twice daily and report any adverse events via WeChat. Both groups experienced PCR testing daily during the study, which ran from October 31 to November 30. Needle-free Covid vaccines have been rolled out in some nations, including China, the recent global center of the pandemic.

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