With a dramatic drop in bookings, volunteer tourism projects in developing countries have been hit hard, affecting local economies which depend heavily on volunteer spending and help.
It isn't always good advice for tourists to stay away. Often their money can help, as well as their skills.
Volunteer tourism is often criticised for focusing on profit and volunteer experience. But improving monitoring and evaluation and putting host communities in charge can make it more sustainable.
Voluntourists' ability to change systems, alleviate poverty or provide support for vulnerable children is limited. They don't have the skills and can perpetuate patronising and unhelpful ideas.