Hello Everyone, this is Marilyn K from the US. Online courses cannot usually affect health but when you took so many online courses at once then this will affect you because everything has its pros and cons. If you take admission in an online course and want to get Hyper Island recognition then this is ok but when you took many online courses then you will never succeed in your particular field. So, choose online courses wisely and do not put the burden on yourself because health is wealth.