The only recent evidence it contains is the fact that 3 researchers from WIV sought hospital care back in autumn of 2019 with symptoms similar to COVID. However, this piece of evidence is hardly consequential without further details:
- First, most common symptoms of COVID are indistinguishable from common cold. If the researchers were known to have any "signature" symptoms like loss of smell the article would certainly mention it.
- Second and more importantly, China doesn't have a robust GP/family doctor system found in western countries. As a result, many people would go to hospitals directly whenever they're mildly sick.
Taking the evidence as we know it now, the straightforward explanation is that 3 researchers caught cold, got mildly sick, so went to the hospital to get prescriptions or doctor's notes for sick leave (in China it's common for employers to require a doctor's note even for a short sick leave).
That said, I believe the lab leak theory is still plausible, and shouldn't be ruled out unless a clear transmission path from bat to human has been identified (which was done for the 2002 SARS outbreak). But I also think that we may never know. I trust that some theories put forward were in good faith, but so far they are little more than speculations.
The take away is that it doesn't matter whether it was from a lab or whether it was naturally originating. What matters is that it was (and still is) completely reasonable to question the official narative. The CDC chose to favor the CCP wet market story because they wanted to maintain a positive relationship in order to ensure they got accurate numbers -- they broadly lied to the American public about the certainty of the science in order to achieve political goals. The media, who should have kept the CDC accountable in such a situation, instead could not resist to tell a story about a disagreement between the Trump administration and the CDC/Fauci (both sides did this).
It does not matter where it originated. What matters is the media didn't do their job and the American public was intentionally misinformed by the federal government in a time of crisis, and the people who called out the government and called out the media were ostracized for it. American institutions broadly failed to meet their responsibilities to the public.