Advice requested

Opinion

... in response to Pfizer-BioNTech and Sinovac vaccines boost SARS-CoV-2 neutralizing responses

Advice requested

Carlos Contreras says:

June 23, 2021 at 7:43 PM

From Mexico. My wife (53F) has received one dose of Sinovac 4 weeks ago and is expected to receive dose 2 in the near future (the Mexican government sets the schedule). Given the poor performance of Sinovac, my question is: Will applying a single dose of another vaccine (Pfizer, Moderna, Jenssen) in any way help boost her immunity? We are aware of risks associated, but will face them if there is any positive outcome to be expected.

Thank you.

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Reply
- Vaccine mixing has so far produced great results, and immunologically
  
  Priscilla Falzirolli says:
  
  June 24, 2021 at 5:34 PM
  
  Vaccine mixing has so far produced great results, and immunologically speaking, there's no reason for an extra dose not to increase protection, even more so concerning these inactivated vaccines. They would have greatly benefitted from a three-dose program from the start, especially among the elderly, and countries using them should seriously consider a booster dose.
  
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  - Dear, how about four doses?2 sinovac and 2 pfizer
    
    Peter Choong says:
    
    August 5, 2021 at 11:28 AM
    
    Dear, how about four doses?2 sinovac and 2 pfizer
    
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    Reply

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