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        Signature
      
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        /s/ Rene Paula Molina as Attorney-in-Fact for Mei Mei Hu
      
      
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        Stock symbol
      
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        VAXX
      
      
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        Transactions as of
      
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        Mar 7, 2023
      
      
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        Transactions value $
      
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        $0
      
      
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        Form type
      
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        4
      
      
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        Date filed
      
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        4/5/2023, 04:56 PM
      
 
     
   
 
  
    Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)
  
  
    
      
        
          | Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Underlying Class | Amount | Exercise Price | Ownership | Footnotes | 
      
      
          
            | transaction | VAXX | Stock Option (right to buy) | Award | $0 | +620K |  | $0.00 | 620K | Mar 7, 2023 | Class A Common Stock | 620K | $2.29 | Direct | F1 | 
          
            | transaction | VAXX | Stock Option (right to buy) | Award | $0 | +73.9K |  | $0.00 | 73.9K | Mar 7, 2023 | Class A Common Stock | 73.9K | $2.29 | Direct | F2 | 
      
    
   
  
    * An asterisk sign (*) next to the price indicates that the price is likely invalid.
  
  
    Explanation of Responses:
  
  
  
    Remarks:
  
  Chief Executive Officer and President.