Does contact tracing necessarily sacrifice privacy? (via Nicky Case)


From 3Blue1Brown.

Though many contact tracing apps involve location tracking, they don’t have to.
This is a video adaptation of a post by Nicky Case:
New post by Nicky on COVID-19:
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Where did the number 60% come from?

The specific figure is Figure 3, the last panel showing instant contact tracing (with an app). It shows what combination of % (symptomatic) cases isolated & % (pre/a-symptomatic) contacts quarantined would contain the virus or not.

Mental health resources (copied form a John Green video, since he knows what he’s doing):
National Suicide Prevention Lifeline: 1-800-273-TALK (8255)
I know it can be scary to make a phone call, but people are nice, I promise.
Substance Abuse and Mental Health Administration helpline: 1-800-662-HELP (4357)
The Trevor Project: 866-488-7386
International helplines:

Mental Health Resource list and links:
The Anxiety and Depression Association of America:
Mental Health screening tools:


Music by Vincent Rubinetti.
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If you want to contribute translated subtitles or to help review those that have already been made by others and need approval, you can click the gear icon in the video and go to subtitles/cc, then "add subtitles/cc". I really appreciate those who do this, as it helps make the lessons accessible to more people.


3blue1brown is a channel about animating math, in all senses of the word animate. And you know the drill with YouTube, if you want to stay posted on new videos, subscribe:

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