An attenuated virus vaccine can infect cells enough to give you a very mild infection, hopefully one that you can't even detect. They're also a little scary for this reason, because you're dealing with an organism that has heredity and therefore would evolve. It doesn't evolve very well if it doesn't move from one into the next. But as soon as that trick gets introduced, it's a different thing.

Get the Snipd
podcast app

Unlock the knowledge in podcasts with the podcast player of the future.
App store bannerPlay store banner

AI-powered
podcast player

Listen to all your favourite podcasts with AI-powered features

Discover
highlights

Listen to the best highlights from the podcasts you love and dive into the full episode

Save any
moment

Hear something you like? Tap your headphones to save it with AI-generated key takeaways

Share
& Export

Send highlights to Twitter, WhatsApp or export them to Notion, Readwise & more

AI-powered
podcast player

Listen to all your favourite podcasts with AI-powered features

Discover
highlights

Listen to the best highlights from the podcasts you love and dive into the full episode