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Serum soluble HLA-G (sHLA-G) levels have been shown to be upregulated in COVID-19 patients. In this study, sHLA-G levels were examined in COVID-19 patients 14-21 days post-recovery (100 patients) and 80 uninfected controls. In addition, individuals vaccinated with Sinopharm or Pfizer-BioNTech (50 individuals each) were followed 21 days post-first dose and 21 days post-second dose. Serum sHLA-G levels were significantly higher in recovered patients than in controls. The first and second doses of Sinopharm and Pfizer-BioNTech were associated with significantly elevated levels of sHLA-G compared to controls or recovered patients, except for the first dose of Pfizer-BioNTech where sHLA-G levels did not show significant differences compared to recovered patients. In conclusion, recovery from COVID-19, as well as vaccination with two doses of Sinopharm or Pfizer-BioNTech, were associated with up-regulated levels of sHLA-G molecules, but the first dose of Sinopharm had the greatest effect in raising sHLA-G levels. |
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