How long is the effect anti tetanus serum after injection n?

The effect of anti-tetanus serum (ATS) typically lasts for about 2 to 3 weeks. It provides passive immunity by supplying pre-formed antibodies against the tetanus toxin, which helps to neutralize the toxin in case of exposure. However, for long-term protection, vaccination with tetanus toxoid is recommended, as it stimulates the body to produce its own antibodies.