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Health officials had feared the US Thanksgiving holiday in late November would lead to a fresh outbreak of the novel coronavirus after millions of Americans traveled to join friends and family.

With northern hemisphere countries hit by a pandemic winter surge, Britain this week became the first Western country to roll out the Pfizer-BioNTech vaccine.

Moderna also confirmed that it expects to have 20 million vaccine doses available in the US by the end of 2020.

The scientific head of the US operation to develop a vaccine, Moncef Slaoui said Monday that the green light would probably come in December.

The test is designed to be affordable and is intended to cost less than $50, according to the Lucira Health website.

The device targets adults 22 years or older who suffer from nightmare disorder or have nightmares from post-traumatic stress disorder (PTSD), the FDA said on Friday.

Drug gets approval for use in adults, paediatric patients of 12 years and above and weighing more than 40 kg for Covid treatment