A researcher watches the CRISPR process. Photo: Gregor Fischer/picture alliance via Getty Images

Following the claims that a Chinese scientist has used CRISPR to create genetically modified twins, the co-inventors of the gene-editing tool, Feng Zhang and Jennifer Doudna, released separate statements that urged caution and called for a moratorium on editing the genes of embryos.

Why it matters: Feng's and Doudna's concerns mirror those of other scientists and bioethicists, namely that the Chinese experiment is not transparent and that gene-editing standards should be set before babies' DNA is altered.

What they're saying: Feng asked for a full "moratorium on implantation of edited embryos ... until we have come up with a thoughtful set of safety requirements first," according to MIT Technology Review.

  • Doudna said in a statement the claims have not been verified in peer-reviewed journals, but if the Chinese CRISPR experiment were confirmed, scientists should "confine the use of gene editing in human embryos to settings where a clear unmet medical need exists, and where no other medical approach is a viable option."

Go deeper

Updated 54 mins ago - Politics & Policy

Coronavirus dashboard

Illustration: Aïda Amer/Axios

  1. Global: Total confirmed cases as of 12:15 p.m. ET: 21,261,598 — Total deaths: 767,054— Total recoveries: 13,284,647Map.
  2. U.S.: Total confirmed cases as of 12:15 p.m. ET: 5,324,930 — Total deaths: 168,703 — Total recoveries: 1,796,326 — Total tests: 65,676,624Map.
  3. Health: The coronavirus-connected heart ailment that could lead to sudden death in athletes — Patients grow more open with their health data during pandemic.
  4. States: New York to reopen gyms, bowling alleys, museums.
  5. Business: How small businesses got stiffed — Unemployment starts moving in the right direction.
  6. Politics: Biden signals fall strategy with new ads.

Kamala Harris and the political rise of America's Indian community

Vice presidential hopeful Sen. Kamala Harris (D-Calif.) Photo: Drew Angerer/Getty Images

When Democrats next week formally nominate the daughter of an Indian immigrant to be vice president, it'll be perhaps the biggest leap yet in the Indian American community's rapid ascent into a powerful political force.

Why it matters: Indian Americans are one of the fastest-growing, wealthiest and most educated demographic groups in the U.S. Politicians work harder every year to woo them. And in Kamala Harris, they'll be represented in a major-party presidential campaign for the first time.

6 hours ago - Health

The cardiac threat coronavirus poses to athletes

Illustration: Annelise Capossela/Axios

Cardiologists are increasingly concerned that coronavirus infections could cause heart complications that lead to sudden cardiac death in athletes.

Why it matters: Even if just a tiny percentage of COVID-19 cases lead to major cardiac conditions, the sheer scope of the pandemic raises the risk for those who regularly conduct the toughest physical activity — including amateurs who might be less aware of the danger.