While some countries opted to shut their borders for all travellers in order to contain the spread of the coronavirus, some chose to open their shores for business travellers.
Bear in mind that even though business travel is possible, visa applications may include complicated procedures. Moreover, transportation in destinations may be limited. Here are some countries that allow entry from all over the world.
India (except for travellers from the UK)
South Korea (except for travellers from the UK)
US (except for travellers from the UK and China)