it trice in much of the u.s. a fourth dose of moderna or pfizer is safe and provides a substantial immunity boost. i asked if he thought there might be a big surge in covid cases later this year. take a listen. as you know, rosemary, this virus is quite unpredictable. we saw only twice as many in the wurz monstrous omicron wave. right now, we noticed an increase in prices. that s become dominant. and which is a subvariant.