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World Health Organization officials hold a press conference on Friday to inform the public about the coronavirus outbreak, which has infected more than 88.2 million people worldwide, as governments battle to introduce vaccines.
The briefing comes as the United States announced its deadliest day of the pandemic to date, killing more than 4,000 people in one day. Around the world, governments who have received doses of vaccines manufactured by Moderna and Pfizer-BioNTech are trying to fire off shots as quickly as possible.
WHO officials and immunologists around the world are closely monitoring the genomic sequence of the virus as new variants spread in some parts of the world. A strain first discovered in the UK has spread to the US and other countries, although it has not yet finally taken root outside of the UK
Another strain, first spotted in South Africa, worries experts that vaccines and certain Covid-19 treatments may not be as effective against this strain as others.
Read CNBC’s live updates for the latest news on the Covid-19 outbreak.