Though currently approved COVID-19 vaccines effectively provide immunity against the virus, it's unclear how long that protection will last.
New DNA evidence shows humans may have been battling coronaviruses for longer than recorded history.
Various companies use different ingredients and different delivery systems in their COVID-19 vaccines. Researchers are investigating whether it's better for individuals to mix what's available.
Vaccination is likely to substantially reduce virus transmission by reducing the pool of people who become infected, and reducing virus levels in people who do get infected.
Scientists around the world are trying to come up with universal coronavirus vaccines to combat the emergence of variants. But what are these vaccines and are they even possible?
Children in the study seemed to display a very strong "innate" immune response.
While the whole world is obsessed by the COVID-19 pandemic, another equally deadly threat is going unnoticed: antibiotic resistance.
Long-term protection will depend on the 'memory response' developed by our immune systems – and the initial signs are promising.
Sterilising immunity means that the immune system is able to completely prevent a virus from replicating in your body. Not all vaccines provide this.
Fauci turns 80 this Dec. 24 – and he's been on the national stage for decades. Here's more about his work before COVID-19 and why he was perfectly poised to help the US respond to the pandemic.
Several new studies show our immune responses to the virus can last at least eight or nine months, and probably longer.
A new study is the first to identify sex differences in inflammation and immune cell activation in response to SARS-CoV-2 infection, which causes COVID-19.
Our first exposure to a pathogen, either naturally or via vaccination, can affect how our immune system responds in the future to the same or similar pathogens.
A group of 28 vaccine researchers said we might have a vaccine by late-2021, though it could take until well into 2022.
Older coronavirus patients face grimmer outlooks. A virologist explains the aging-related changes in how immune systems work that are to blame.
Antibodies are great for neutralizing viruses. But they are big and bulky. Antibody engineers are now creating smaller synthetic antibody-like molecules that may be better for fighting COVID-19.
Herd immunity has entered the everyday language, but it is a much misunderstood term.
An unprecedented level of research has gone into understanding the novel coronavirus. Here's what we still don't know.
Wearing face masks may allow a tiny number of viral particles to slip through, possibly allowing our body to gain some sort of immunity.