A hypothesis. So is it a possibility, you bet. Has anyone disproven that hypothesis since 12 year old's started to get vaccinated in the last month, no. Are there any facts or is everything a hypothesis until the proof is undeniable. Masks are necessary...BS, I have provided information to this board of my own and from international hospitals and doctors that support masks, unless N95 worn for less than 30 minutes, are useless and worst than that they are harmful.