"Our test kits have shown their high quality in China, Iran, have been transferred to Italy. Ordinary Americans should know - Russia, if necessary, will be ready to help the United States as it has repeatedly offered assistance in putting out fires in California," the Russian Embassy quoted Antonov as saying in its Facebook statement.
The number of registered coronavirus cases in the United States on Tuesday evening reached 53,660, the death toll stood at 703 people.
Antonov said US media outlets were rudely trying to switch public attention from the difficult coronavirus situation in the United States to the situation in other countries.