if (something) catches a cold, (something else) gets pneumonia

if (something) catches a cold, (something else) gets pneumonia

If a person, group, or entity has a problem or experiences a negative situation, a related person, group, or entity will consequently have a worse problem or will experience a more negative situation. If Paris catches a cold, Europe gets pneumonia. Terrorism in France affects security throughout the continent.See also: catch, get, if, pneumonia