H1N1 flu has caused at least 20 deaths , mostly in Mexico . Man in Saint Louis , Missouri , may be latest to die of flu in United States . The boy had a fever when his mother brought him to a hospital Monday Some say flu is behaving similar to typical seasonal flu .
H1N1 flu has caused at least 20 deaths , mostly in Mexico . Man in Saint Louis , Missouri , may be latest to die of flu in United States . Some say flu is behaving similar to typical seasonal flu .