Haan beti, it is absolutely possible to spread the coronavirus even without showing any symptoms yourself. This is known as asymptomatic spread, or sometimes pre-symptomatic spread, meaning you might transmit the virus to others before your own symptoms even begin. This is why it became so challenging to control, as seemingly healthy individuals could unknowingly be carriers.

As for early signs, while many people experience fever, cough, fatigue, and loss of taste or smell, some report no symptoms at all, as you've observed. Others might have very mild symptoms like a slight body ache or sore throat which they might dismiss as a common cold. Given this, it was always best to follow safety protocols like masking, hand hygiene, and social distancing, especially during the peak times, to protect everyone.