====== Covid-19 ======

''**Editor's note :** Because of the intense, ongoing, global research efforts related to [[https://en.wikipedia.org/wiki/COVID-19|Covid-19]], it's difficult to get an accurate picture of the unknown factors. Here are some of the many as-yet-unanswered questions''

| Why does the virus have much more serious effects in older people? | current research | partially understood  |
| Were less virulent variants in circulation prior to the major Wuhan outbreak? | current research | unknown  |
| Has the virus reached peak virulence / infectivity? | current research | unknown  |
| Will anti-viral drugs eventually be able to cure the disease? | current research | partial results  |
| What is the incidence of 'Long Covid'? | current research | insufficient data [[https://ebm.bmj.com/content/early/2023/08/10/bmjebm-2023-112338|ref.]]  |
| Is the incidence of 'Long Covid' affected by the number of times a patient has had Covid? | current research | unknown  |
| What range of symptoms does 'Long Covid' present? | current research | under review  |
| How long-lasting are the symptoms of ‘Long Covid’? | current research | unknown  |
| Is the often-reported 'Brain Fog' part of ‘Long Covid’? | current research | unknown  |
| Is 'Brain Fog' caused by the virus directly infecting the brain? | current research | unknown  |
| How long does vaccine protection last? | current research | estimated only  |
| How long do infection-generated antibodies remain effective? | current research | estimated only  |
| Which other mammals can contract covid? | current research | Growing list  |
| Which animals can transmit to humans? | current research | not known |

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