Does one not need to be infected to effectively transmit the virus? I.e. if you're infected your body is actively multiplying the virus. If you're not infected,

Does one not need to be infected to effectively transmit the virus? I.e. if you're infected your body is actively multiplying the virus. If you're not infected, then you're just passing on whatever virus you happen to be contaminated with. There's a massive difference between the two I should think.