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welcome to the cotkey ride home for Thursday, April 15th, 2021.

I'm Jackson Bird.

The CDC says that we should wait two weeks after our final COVID-19 vaccinations to be considered fully vaccinated.

But why?

What do Spiderwebs sound like?

These scientists turned them into music.

Google Earth's latest feature shows us how destructive we have been to the planet.

And the new YouTube channel that I can't get enough of that features hot wheels on a treadmill.

Here are some of the cool things from the news today. So one thing about vaccines that I at least feel like isn't

being super well publicized is the need to wait for two weeks after your last shot before you can

consider yourself fully vaccinated.

And this goes for any of the vaccines you may be getting. So if it's a single shot, like

Johnson and Johnson, you're fully vaccinated two weeks after that single shot. And if it's two

shots, like Moderna or Pfizer, you're fully vaccinated two weeks after your second shot.

That is the official word from the CDC here in the U.S. and is supported by infectious disease experts. But why exactly? Mark Cameron,

an immunologist at Case Western Reserve University, who was instrumental in containing SARS in 2003,

explains it's like vaccines are giving our immune system a to-do list,

...