U.S. prepares for worst four months of the pandemic as it stares down the 'darkest' days yet The U.S. is heading for a “dark winter,” a “Covid hell" that will make the next few months of the coronavirus pandemic unlike anything the nation has seen yet. Will Feuer CNBC

• Epidemiologists, scientists and public health officials are warning that the United States has yet to see the most difficult days of the coronavirus outbreak.

Can a nose-full of chicken antibodies ward off coronavirus infections? A novel project aims to temporarily protect humans from COVID-19 with a nasal spray Science | AAAS

While the world waits for a widely available, safe, and effective COVID-19 vaccine, scientists are becoming ever more creative in their search for other ways to protect people from the disease. Now, a clinical trial has begun in Australia to find out whether nasal drops that contain chicken antibodies to SARS-CoV-2 can offer temporary protection.

One in five COVID-19 patients develop mental illness within 90 days of diagnosis, new study finds Those with previous psychiatric diagnoses were 65% more likely to contract the coronavirus PhillyVoice

Psychiatrists are placing more attention on COVID-19's damaging impact on mental health following startling results from a new study. 

Not wanting to be outdone by Pfizer, Putin says Russia is about to register a third Covid vaccine Russian President Vladimir Putin said Russia is about to register its third vaccine against the coronavirus, according to Russian news agencies. Holly Ellyatt CNBC

President Vladimir Putin said Tuesday that Russia is about to register its third vaccine against the coronavirus, according to Russian news agencies.