Covid-19 cases across the country, Union Health and Family Welfare Minister Harsh Vardhan has assured that "all possible support is being extended to states to fight COVID-19 by taking steps to - double Remdesivir production and supply, ensure uninterrupted supply of oxygen, continuously supply COVID-19 vaccines and enhance healthcare infrastructure."Informing about the measures that are being taken to strengthen the vaccination drive across the country, he highlighted the following steps in pointers and tweeted, "COVID-19 vaccine supplies of small states being replenished every 7 days and every 4 days for big states.