I saw this recently – Johnson & Johnson had a very bad week — but fears of negative reactions and blood clots are likely overblown: https://www.businessinsider.com/johnson-and-johnson-vaccine-side-effects-still-safe-2021-4.
Aria Bendix April 10, 2021
Johnson & Johnson’s coronavirus vaccine rollout hit several unfortunate snags this week — some far worse than others.
The New York Times reported on Tuesday that 62 million of the company’s vaccine doses must be checked for contamination, following an error at a Maryland manufacturing plant that already ruined 15 million doses. The plant’s workers accidentally mixed up some vaccine ingredients last month.
This is the vaccine I am getting next week. I am not concerned as I don’t think it will be an issue.