Following is the unofficial transcript of a CNBC interview with Moderna Inc (NASDAQ:MRNA) CEO Stephane Bancel on CNBC’s “Squawk Box” (M-F, 6AM-9AM ET) today, Thursday, March 24. Following is a link to video on CNBC.com: Moderna CEO Stephane Bancel On Fourth Covid Vaccine Dose, BA.2 Omicron VariantJOE KERNEN: Moderna holding its “Vaccine Day.” It’ll be announcing some new vaccine developments. Meg Tirrell joins us now with a special guest. Morning Meg. Q4 2021 hedge fund letters, conferences and more MEG TIRRELL: Good morning Joe. That special guest is Stéphane Bancel, the CEO of Moderna. Stéph…