Have they ever stop? The answer is yes; officially, at least. But unofficially, experimenting with lethal viruses did not stop.
Under Trump, the US government lifted a moratorium imposed by the Obama administration on financing directed to experiments with lethal viruses.
In other words, it opens the door to a series of controversial trials that can turn viruses into a deadly weapon, something that was banned since 2014 by Barack Obama.
The measure unlocks the manipulation and reinforcement of pathogens such as respiratory syndrome due to the Middle East coronavirus (MERS), influenza or the acute and severe respiratory syndrome (SARS) and extends this type of method to other viruses such as Ebola.