The Japanese Ministry of Health said the impurity found in the contaminated moderna vaccine lot in this country could be metal powder.

NHK August 26 led sources from the Japanese Ministry of Health, said the impurities were found in this moderna vaccine lot reacted to the magnet and suspected of metal powder.

A Japanese Ministry of Health official said contaminants have not been confirmed.

The Ministry of Health and Takeda Pharmacy Company previously announced that Japan would stop using 1.63 million doses of Vaccine Moderna after some vaccination centers discover strange substances inside some unopened vials.

Health workers prepare Moderna's dose of Covid-19 vaccine in Tokyo, Japan, on May 24.

Spanish Rovi Pharmaceutical Company, in charge of Bottled Vaccine Moderna for US markets, said contaminants may be due to problems in production lines and are conducting investigations.

According to the Japanese Ministry of Health, the decision to stop injecting moderna vaccine lots is only a precautionary measure, but some companies have decided to cancel immunizations for employees.

A Japanese Ministry of Health official said it would take a period of time to confirm how many contaminated vaccines were injected in this country.

Japan currently records more than 1.3 million cases of NCOV and more than 15,700 deaths.