by Lucie AUBOURG Agence France Presse WASHINGTON, United States (AFP) — Pfizer said Friday that a clinical trial of its pill to treat Covid-19 had shown it is highly effective, hailing it is as a big step toward ending the pandemic. A simple pill to treat the coronavirus at home has been sought since the start of the global health crisis. So far all treatments have been either intravenous or vaccine shots. Pfizer’s is […]