According to a treasure trove of about 10,000 pages of government documents, it turns out that the NIH was in fact funding virus alteration research over at the Wuhan Institute of Virology. Specifically, the money was being funneled through a subgrant given to an organization called the EcoHealth Alliance. And what the researchers were doing was taking bat coronaviruses, altering them, and then seeing what these newly created viruses were doing inside of humanized mice.
And according to the interim reports, which were included within this treasure trove of documents, it turns out that these lab-created viruses were at least 300 percent more deadly. However, the NIH came out after this fact was revealed, and they said that what they were doing did not qualify as gain-of-function research.