Fourth jab's protection against Covid is short lived for those above 60: Study
JERUSALEM : As world anticipates a fourth wave of Covid-19 at a time, Shanghai, the financial hub of China records over 17000 cases.
A large-scale study conducted in Israel has revealed that a fourth dose of the Pfizer vaccine lowered rates of Covid-19 among people aged 60 years, however, the protection against the infection is only temporary.
The study, published in New England Journal of Medicine, estimated the rate of confirmed infection and severe Covid-19 starting at eight days after receipt of a fourth dose as compared with that among persons who had received only three doses, and among those who had received a fourth dose 3 to 7 days earlier (control).
The study took data from Israeli Ministry of Health database. They looked at 1,252,331 persons 60 years of age or older and eligible for the fourth dose during a period in which the Omicron variant was predominant.
United States
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Cases: 46 252 513
Deaths: 750 423
Recovered: 0
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India
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Cases: 34 321 025
Deaths: 459 652
Recovered: 0
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Brazil
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Cases: 21 835 785
Deaths: 608 235
Recovered: 0
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United Kingdom
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Cases: 9 215 683
Deaths: 141 607
Recovered: 0
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Russia
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Cases: 8 494 589
Deaths: 237 619
Recovered: 0
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