Where are the covid vaccines?

Where are the covid vaccines?
Staff reporters
Trading in US stocks was muted overnight as the uneven progress towards vaccinating populations against covid-19 caused investor concern.Vaccine maker Moderna said earlier this week it would trial a booster shot for its covid-19 vaccine after tests showed it may not be as effective on the new, more infectious, South African variant. Its vaccine is reportedly 95 percent effective against the most prevalent strains.The new variants are worrying US health experts, who fear a surge of cases just as there is hope new infection rates are declining, C...