The Delta Variant Is Already Leaving Its Mark on Business

Repercussions from the Delta variant of Covid-19 are starting to ripple across companies, raising staffing costs in senior housing, disrupting production of potato chips and leading some companies to rein in profit projections.

Still unclear: whether the highly contagious strain of the virus will be a momentary stumble in an improving global economy—one that businesses and consumers are now better equipped to handle—or something more serious.

In recent weeks, Kellogg Co. said Delta’s spread in Malaysia slowed production of Pringles there. Online travel company Booking Holdings Inc. said overall bookings declined as Delta took root in...