Do you still think Pfizer COVID-19 vaccine effective?
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Do you still think Pfizer COVID-19 vaccine effective?
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Do you still think Pfizer COVID-19 vaccine effective after their CEO infected again even received 4 doses?
Pfizer CEO is positive for the COVID-19 again, and has received four doses of vaccine before, experts see this.
screenshot from YouTube
Burra, 60, was first diagnosed with the COVID-19 in mid-August. He had previously received four doses of the Pfizer vaccine and had taken Pfizer’s small-molecule antiviral drug Paxlovid.
Pfizer CEO Albert Bourla said on social media on September 24 that he tested positive for the COVID-19 again. This is less than a month and a half since he last contracted the COVID-19.
Burra said he was feeling well and had no symptoms. According to the guidelines of the US Centers for Disease Control and Prevention (CDC), the COVID-19 vaccine can not be vaccinated until three months after the COVID-19 infection, so Burra said that he has not yet received the updated bivalent vaccine against the BA.5 variant of Omicron.
“Despite our remarkable achievements, the helpless virus is still there,” Burra said.
Burra, 60, was first diagnosed with the COVID-19 in mid-August. He had previously received four doses of the Pfizer vaccine and had taken Pfizer’s small-molecule antiviral drug Paxlovid.
In the past two months, US President Biden and White House Chief Medical Officer Anthony Fauci have all tested positive for the COVID-19 again.
In this regard, the CDC has made it clear that the recurrence of COVID-19 symptoms may be a way for some people to contract the virus, but the CDC data shows that the proportion of patients hospitalized due to reinfection is quite low.
In this regard, a virus expert told the media:
“It is generally believed that it is unlikely that the same virus variant will be repeatedly infected within three months, because immunity will be produced within a certain period of time after infection, so either the interval In a very short period of time, some people with low immunity (such as the elderly) rebounded from the virus that was not cleared from the body, resulting in a positive test again; or they were infected with another more infectious new subtype variant, I think in the case of the Pfizer CEO, the latter is more likely, but it still has to be determined by genetic sequencing of the virus samples.”
This fall, Pfizer’s bivalent booster vaccine against Omicron BA.5 will begin in the United States.
BA.5 now accounts for about 85% of new infections in the U.S., according to the latest U.S. data. However, new subtypes, including Omicron BA.4.6, have spread rapidly in the United States, and several studies have suggested that BA.4.6 can further escape the immune protection produced by BA.5.
Last month, scientists identified a new variant of the Omicron subtype, BA.2.75.2. A few days ago, researchers including Xie Xiaoliang’s team at Peking University published a preprint study saying that BA.2.75.2’s ability to escape immunity is better than any of the current Omicron subtype variants.
In response to the constantly mutating virus, is it still necessary to repeatedly vaccinate to obtain immunity?
Currently The research of China still supports us to awaken the immune memory through repeated vaccination, which means that we may need to receive the fourth, fifth or even sixth booster vaccine.
According to our current response to the virus And the cognition of vaccine immunization, the interval between booster doses is generally half a year.”
(source:internet, reference only)
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