COVID-19 immunity: 15% immune instead of expected 40% in Sweden; what immunological dark matter means and more
Sweden had more confirmed COVID-19 cases and fatalities than other Scandinavian countries, which implemented lockdown in March
Developing a treatment or vaccine for severe COVID-19 is currently the world's top public health priority.
Research suggests patients became infectious 2 days before symptom onset and can only spread the infection for up to 7-10 days after showing the symptoms.
The evidence we have for the number of recoveries so far is encouraging - close to 110,000 have recovered and not faced complications since.
Blood types and naturally occurring antibodies could influence the spread or severity of infection.