In early March, Cara Soulia was preparing for a spring filled with photo shoots for local schools. Instead, the family photographer from Needham, Mass., started taking pictures of families quarantined by the coronavirus pandemic, creating a global project that has raised more than $3.25 million for different charities.
Ms. Soulia had been thinking about how she could document the spreading pandemic and its effect on society, so when Kristen Collins, a friend and business consultant, suggested she offer to photograph local…