Do international couriers generally open and disinfect packages?

It depends on the courier company's policies and regulations．Some courier companies may open and disinfect packages, especially if they are shipping items that are considered high-risk for transmitting infectious diseases．However, other courier companies may not have such policies in place.

In general, if you are shipping items that are perishable or could potentially spread infectious diseases, it is a good idea to inform the courier company and ask them about their policies on disinfecting packages．Additionally, you may want to take extra precautions such as packing the items in sealed containers and using disinfectant wipes on the outside of the package.