National security adviser Jake Sullivan's warning came as Russia has been spreading a conspiracy theory that the U.S. funds biological weapons labs in Ukraine.
The former Democratic congresswoman was accused of being a "Russian asset" for her comments about biological labs in Ukraine.
Chinese Foreign Ministry spokesperson Zhao Lijian urged American leaders to provide "thorough clarification" regarding the nation's biological military activities.
The former congresswoman has been condemned for a video which seems to defend Russia's assertions of U.S.-funded labs in Ukraine.
Russia's bioweapons accusation could be part of a larger plan to launch germ warfare in Ukraine, one CIA official said.
Scientists and the State Department have challenged the Kremlin's suggestion that the United States is financing the development of chemical and biological weapons in Ukraine.
A spokesperson for China's Foreign Ministry said Russia "has uncovered the secret of the U.S. labs in Ukraine."
Moscow has spread more falsehoods about military labs in Ukraine as it attempts to justify its attacks on the Eastern European country.
A State Department spokesperson told Newsweek that Ukraine has "diagnostic and biodefense laboratories" which "are not biological weapons facilities."
White House press secretary Jen Psaki tweeted that Russia's claims of U.S. bioweapons in Ukraine could be an excuse for Russia to release one of its own.
Russian officials are continuing to spread and old conspiracy theories about U.S.-run bio-labs in Ukraine to justify its invasion.
Bestselling author Greg Mitchell debates Hudson Institute senior fellow Rebeccah Heinrichs.
Rep. Peter King (R-N.Y.) insists that he does not endorse the theory that China created the virus as a biological weapon, but says that it is "worthy of investigation," despite researchers having concluded that the theory is not true and the virus could not have been engineered in a lab.
The amendment was put forward by Rep. Chris Smith, who was "inspired" by several books and articles claiming that the U.S. government conducted research between the 1950s and 1970s.
While the president criticized Russia and Iran during the Security Council meeting, he expressed appreciation for the "restraint" both nations have shown in Syria's Idlib province.
The discovery raises concerns over North Korea's biological weapons production.
The U.S. does have a history of controversial medical experiments elsewhere.
Unlike the testing of rocket technology, the weaponization and cultivation of viruses can be done behind closed doors.
There may be merit to the intelligence community's concern about Trump's discretion.
Biodefense research used thousands of monkeys for painful experiments after 9/11.