The number of confirmed and probable human A/H1N1 flu cases has risen to 5,469 in 48 U.S. states, with six deaths, the U.S. Centers for Disease Control and Prevention (CDC) reported on Tuesday.
The figures didn't include one confirmed death from the new flu reported in New York City on Sunday.
The CDC said on its website that it's uncertain at this time how severe this novel H1N1 outbreak will be in terms of illness and death compared with other influenza viruses. Because this is anew virus, most people will not have immunity to it, and illness may be more severe and widespread as a result.
In addition, currently there is no vaccine to protect against this novel H1N1 virus. CDC anticipates that there will be more cases, more hospitalizations and more deaths associated with this new virus in the coming days and weeks.
According to the CDC, the number of confirmed and probable cases on Monday was 5,123 in 48 states.