Complex sentence: The school is thus well equipped to handle everyday medical/first-aid issues: antiseptics are the principal remedy administered to victims of minor maladies; in the unlikely event of a major catastrophe, the hypothetical victim would be transferred to hospital via an ambulance.
Split into simpler sentences: The school is thus well equipped to handle everyday medical/first-aid issues. First-aid is administered for minor maladies; in the unlikely event of a major catastrophe, arrangements are made to transfer to hospital via an ambulance.