500 million doses of anti-coronavirus vaccine to the world, as promised by President Joe Biden, was not enough and the United States should do more in the global fight against the pandemic.Before attending a G-7 summit in England, Biden on Thursday promised to donate 500 million doses of vaccine to bolster the fight against the Covid-19 pandemic across the world.Later, British Prime Minister Boris Johnson announced that the G7 nations are set to commit to providing at least 1 billion coronavirus shots to the rest of the world."While I'm glad the US will purchase 500 million doses to support global inoculation efforts with 200 million doses to be given by the end of 2021, that is not enough.