Experts are warning that at least half of COVID-19 cases seen globally may have come from asymptomatic carriers.<br />Symptom-free infected people are unknowingly spreading the virus to others according to a new study.<br />Nearly one in four cases of virus spread involve infected people who remain symptom-free.<br />The findings of the study highlight the importance of social distancing, mask-wearing, and hand-washing.<br />The study co-author said: "To control the pandemic, we must address the 'silent pandemic' of spread from persons without symptoms".
