Recently met with a bike accident, have both my knees scraped and left hand joint too.  Abrasion wound has formed with no serious injuries where bones are visible. But I'm unable to walk easily because of wounds. Hence, I'm treating the wounds at home by running water, cleaning it with h202 and betadine and applying soframaxin and closing the wound by applying gauge. Wanted to ask for any antibiotics that I should take for the period and any injections.