![]() Mr Ho, who declined to give his full name and his occupation, said the long-term effects of mRNA still remain unknown. ![]() One of his customers, Mr Ho, who is in his 60s, recently received his Sinopharm booster jab after two doses of the Pfizer vaccine.Īsked why he had opted for Sinopharm instead of an mRNA vaccine, Mr Ho said he felt the Sinopharm vaccine uses a tried-and-tested inactivated virus technology, whereas the mRNA technique was previously used to help stimulate antibody response in patients with late-stage cancers. No doubt, the best antibody results were still obtained with a third mRNA dose, but many didn't want to go through the same side effects again," he said. "Anecdotally, many who had one dose of the inactivated vaccine after receiving two doses of the mRNA had very good antibody results. One other reason was the US Food Drug Administration not recommending Pfizer booster shots for those aged below 65, as there were concerns about the risk of doing so, compared with the benefits, she noted.ĭr Leong Hoe Nam, an infectious diseases physician at Rophi Clinic, said that many of his patients who received both doses of the Pfizer vaccine had requested the Sinopharm vaccine as a booster.
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