Do people who have previously had Covid-19 need a vaccine?
Experts confirm that people who have had Covid-19 and recovered from the disease have immunity for several months to years. But vaccination is stil…
Vaccine
COVID-19 vaccine is over 90% effective
The news of the COVID-19 vaccine from Pfizer and BioNTech for testing efficacy of over 90% helped the US stock market flood in the first session of …