After the J&J pause, daily vaccination rates plummeted

What this shows is that people ages 18-49, who were rapidly increasing their vaccination rate, took a sudden lurch downward right at the time the J&J pause was announced. Those from 50-64, who were holding steady, also took a big downward dip. Conversely, those under 18, who were approved only for the Pfizer vaccine, showed no change in response. Is this proof that the J&J pause produced the drop in people getting shots? Of course not, but it's certainly suggestive. Did anything else happen in mid-April that might account for this?