Is rabies immunoglobulin effective for more than 3 days?

Rabies immunoglobulin can also be given three days after exposure.
In principle, it is recommended that rabies immunoglobulin be injected as early as possible to achieve a better preventive effect, but if for some reason the timing is delayed, rabies immunoglobulin injected three days after exposure can still play a certain preventive role.
Because the rabies virus infects the human body with a certain incubation period, and the pathogenicity, infectivity, etc. are different, so after exposure, even if it exceeds the optimal prevention time, you should go as soon as possible to make up for the rabies immunoglobulin, or rabies vaccine.
In general, after being bitten by dogs, cats and other animals, it is recommended that rabies vaccine as well as rabies immunoglobulin be injected as soon as possible, preferably within 24 hours. The wound should also be treated promptly.