By Stephanie Nebehay GENEVA (Reuters) -Makers of COVID-19 vaccines should gear up for the “likelihood” of needing to adjust their products to protect against the Omicron variant, the World Health Organization’s (WHO) spokesperson said on Friday. Christian Lindmeier, speaking at a U.N. briefing in Geneva, said the agency was studying the transmissibility and severity of the variant first detected in southern Africa last month. “It is very recommendable that vaccine manufacturers already start planning ahead and plan for the likelihood for having to adjust the existing vaccine,” he said. “That’s…

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