USA-ban jóváhagyták a negyedik dózist:
	
	
		
			
				
					
						 
					
				
			
			
				
					
						
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			Immunocompromised Americans who had a 3rd COVID-19 shot can now get a 4th, CDC says
Immunocompromised adults who had Pfizer or Moderna's two-dose COVID-19 vaccines, plus an additional shot, can now get a fourth, the CDC said.
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