by Hui Min NEO with AFP bureaus BERLIN, Germany (AFP) — The WHO warned Tuesday that the Omicron coronavirus variant could overwhelm healthcare systems despite early studies suggesting it causes milder disease, as China and Germany reintroduced tough restrictions to stem new infections. Covid-19 surges have wreaked havoc worldwide, forcing many nations to make tough choices between economically punishing restrictions to control the spread of the virus and keeping society open. The United States has […]