Available public sources confirm that all four “besties” eventually received COVID-19 vaccinations but do not establish when each one was vaccinated relative to the April 1, 2021 deadline.

Evidence we do have:

• In the original timeframe, E25 (March 13, 2021) shows them discussing Biden’s vaccine timeline, California’s slow rollout, and how many other people they know have already been vaccinated, but they talk about eligibility, hacking the appointment system, and unused inventory rather than clearly stating that all four of them are already vaccinated.(podscripts.co)
• In E28, released April 1, 2021, they discuss vaccines, transmission, and planning a live show after everybody gets vaccinated, and Jason mentions that the U.S. is doing over 3 million shots per day. The segment focuses on population‑level rollout and future live events; it does not say that all four hosts themselves are already vaccinated by that date.(podscripts.co)
• By May 1, 2021 (E31, “Post‑vaccination virtue signaling…”), the show is explicitly framed around “post‑vaccination” behavior and mask‑wearing, indicating at least some or all of them had been vaccinated by then, but the transcript and summaries still don’t give specific shot dates for each host.(allinpodcastsummary.com)
• In a much later episode (E113), David Sacks explicitly says, “we all sat here, we all got vaccinated,” referring to the four hosts’ eventual decisions to take COVID vaccines, but he’s speaking retrospectively and does not indicate when, only that they ultimately did so.(podscripts.co)
• Broad web searches (including news, transcripts, fan discussions, and social media) for each host’s name plus terms like “got vaccinated,” “took the vaccine,” and specific dates do not yield reliable, dated statements of when each individual host received their first dose.(abc7news.com)

Because:

1. We can confirm that all four hosts eventually got vaccinated, but
2. We cannot find credible, dated evidence that each one had received a COVID‑19 vaccine by April 1, 2021, and
3. No transcript, summary, or interview clearly states “all four of us are vaccinated” on or before that date,

there isn’t enough verifiable information to say the prediction was clearly right or clearly wrong. The correct classification is therefore “ambiguous”: enough time has passed, but the truth of the prediction cannot be determined from public sources.