Erica (Johnson) Jersin 鄭秀穎

Advisor & Angel Investor | Co-founder of Modern Health (YC W18) | Stanford Medicine & UCSF Sandler Neuroscience | Fortune 40u40

[Erica (Johnson) Jersin 鄭秀穎 @ericajersin]

@ArthurMacwaters @LegionHealth You all are amazing and should be so proud. You're not only helping so many people, you're making history.

[Erica (Johnson) Jersin 鄭秀穎 @ericajersin]

@gustaf Grattis till familjens nytillskott! You all make a beautiful family. 💛

[Erica (Johnson) Jersin 鄭秀穎 @ericajersin]

Melinda Gates-backed research initiative raises $100M https://t.co/2spMqeIp4N

[Erica (Johnson) Jersin 鄭秀穎 @ericajersin]

Loving this thought for today:

the quality of your curiosity is the quality of your liberation.

[Dave Font @davefontenot]

Every billion dollar founder I know dropped off the face of the earth for years.

We built the perfect home for these people.

It’s called HF0.

In our last batch, teams raising after demo day hit an avg valuation of $82M.

Applications for F25 open today.

[Christina Cacioppo @christinacaci]

Wandering through a museum with an LLM in my ear, asking whatever questions I like, and getting tailored answers is 1000x better than a tour or audio guide. In 12 months this'll likely be passé, but for now it’s magic.

[Erica (Johnson) Jersin 鄭秀穎 @ericajersin]

Let’s goooooo!!! 🔔 Huge congratulations to the hardworking & brilliant team at @HingeHealth 👏🥂

[Hinge Health @HingeHealth]

🔔 With the @NYSE Opening Bell rung, our journey continues. Now it’s time to get back to transforming healthcare with AI-powered, human-centered care. #ListingDay $HNGE

[Gustaf Alströmer @gustaf]

Tonight is the deadline for the @ycombinator S25 batch.

Something special is happening in San Francisco and you can feel it every day. It has once again become the city of dreamers and builders. Looking forward to reading what you all apply with!

[Sachin Agarwal @agarwal]

The @sfstandard broke the news: @GrowSF is growing.

We’ve expanded our team! Leo is leading our research efforts (https://t.co/viRCafzN4K) and McKenna is running our new Talent initiative (https://t.co/yKJPRdScmu). We’re a small but mighty team working in an office every day to elect common sense leaders.

Our donors believe in GrowSF and are doubling down on our work. We’re raising $8 million to keep winning elections next year, with a continued focus on the Board of Supervisors where we hold a slim 1-seat majority. We’re already over a third of the way to our fundraising goal!

SF won’t fix itself. We need people like you to get involved and support our work. If you want to contribute to @GrowSF, DM or email me: [email protected].

[Garry Tan @garrytan]

We need to legalize math in California

Today the anti-math education bureaucrats are trying to force the UC system to water down math standards to accept fake data science courses that don’t teach algebra

We interviewed @minilek, CS division chair @ Berkeley to get the low down

[Erica (Johnson) Jersin 鄭秀穎 @ericajersin]

@bilalmahmood @bilalmahmood 🥹🫶 Loved reading this happy news. Congratulations to you and Cynthia. 💛🎉

[Tim Walz @Tim_Walz]

The American dream starts with a good education.

Every student in the country will be worse off as a result of this reckless decision, and so will the future of our country.

[Min Choi @minchoi]

GPT-4o just got an INSANE upgrade!

OpenAI just dropped native Image Generation in GPT-4o.

Image & Text quality is insane. 100% AI

10 wild examples (prompts included):

1. Polaroid style photographs

[Erica (Johnson) Jersin 鄭秀穎 @ericajersin]

Attorney General Bonta Urgently Issues Consumer Alert for 23andMe Customers https://t.co/T2kWoLICh3

[Matthew Herper @matthewherper]

23andMe’s bankruptcy is the worst thing that could happen to just about everyone involved

It's so bad I quoted Hemingway.

https://t.co/zGOHMojUUh

[Nikunj Kothari @nikunj]

Young people, this rant is for you..

Even the most famous person has 15 minutes to give you—if you give them a good reason to.

Most successful people I know have some combination of family, close friends, a stressful job, unlimited chores—and definitely not enough time to sleep and exercise.

So if you want 15 minutes, they'll find space for you—but you can't just say, "Can I call you?" or, "Can we connect?" or, worst of all, "Let's explore synergies."

Put in the work. Read about them. Understand what this person really can offer you. Write 3-5 simple bullet points of context, along with one concrete ask. If you're sharing attachments, keep them to a single page.

Keep your message short, genuine, and include available times (not a Calendly link). Make sure your signature includes your phone number.

I bet this works better than your standard message—try it and let me know.

Finally, and most importantly: don't feel entitled to anyone's time. If you send a cold email, it doesn't mean they have to respond. Everyone you meet is fighting a battle you know nothing about. Be kind!

[Erica (Johnson) Jersin 鄭秀穎 @ericajersin]

@almostcmb Sign me up. 🙋🏻‍♀️

+bonus points if this personal health OS takes into account personalization for women & cycle syncing (e.g., nutrition and workout suggestions: eat more salads & do HIIT during the follicular phase vs. grain bowls & 100-200 extra calories + yoga during luteal)

[Garry Tan @garrytan]

Huge thanks to the chairwoman of the SF Democratic Central Committee @NancyTungSF

I went on a walk with her 6 years ago in Noe Valley to understand how SF got so bad. Since then we've been fighting for common sense, and common sense is winning.

https://t.co/kZfhBhA4tu

[Satya Nadella @satyanadella]

No one becomes a clinician to do paperwork, but it's becoming a bigger and bigger administrative burden, taking time and attention away from actually treating and supporting patients.

That’s why we’re introducing Microsoft Dragon Copilot, the industry’s first AI assistant for clinical workflow.