A LAWMAKER on Monday called on Congress to investigate reports that the US military ran a secret campaign to discredit the Chinese vaccine Sinovac during the Covid-19 pandemic.

'It is imperative that we ascertain the extent of the damage caused by this secret campaign and hold those responsible accountable,' said House Deputy Minority leader and ACT Teachers Party-list Rep. France Castro, a member of the left-leaning Makabayan bloc in the House. 'The Philippines was one of the areas targeted by this operation, and therefore, it is our duty to safeguard our nation's sovereignty and protect our people's health.'