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#immune system

A person is vaccinated with an injection of the Moderna Covid-19 vaccine at the first Covid-19 vaccination center in Belgium on February 2, 2020 in Brussels, amid the crisis linked with the Covid-19 pandemic caused by the novel coronavirus. (Photo by Kenzo TRIBOUILLARD / AFP)
A person is vaccinated with an injection... […]

More than 100 million vaccinated worldwide

More than 100 million Covid-19 vaccines have been given around the world, an AFP tally has found, but none of the world's 29 poorest countries has formally started mass vaccination drives
Vials with the Pfizer-BioNTech COVID-19 vaccine against the novel coronavirus stand ready for use at the vaccination center in Pfaffenhofen, southern Germany, on January 10, 2021. (Photo by Christof STACHE / AFP)
Vials with the Pfizer-BioNTech COVID-19 ... […]

Five or six doses? Controversy over Pfizer vaccine vials

Five or six doses? Pfizer says each vial of its Covid-19 vaccine contains six doses but the difficulty in obtaining that extra dose means many countries are facing a drop in supply
A syringe is pictured on an illustration representation of COVID-19, the disease caused by the novel coronavirus in Paris on May 18, 2020. (Photo by JOEL SAGET / AFP)
A syringe is pictured on an illustration... […]

Vaccine innovation sparks hope, questions

Pfizer and BioNTech say their vaccine is 90% effective in preventing Covid-19 infections, but experts say the announcement raises many questions such as who it will protect and for how long?
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