The phrase "a more deadly form" is correct and usable in written English.
It can be used when comparing different types or variations of something that is lethal or harmful, indicating that one is more dangerous than another.
Example: "The new strain of the virus is a more deadly form than its predecessors, leading to increased concerns among health officials."
Alternatives: "a more lethal variant" or "a more dangerous type".
In 2006 it made a leap over the Red Sea into Yemen, where it appeared in a more deadly form.
Pandemics occur when the flu virus mutates into a more deadly form and begins to spread easily from person to person.
But few epidemiologists think that such luck can last, or that there won't be another global pandemic — perhaps a more deadly form of the flu, or an entirely new virus.
YOGYAKARTA, Indonesia, May 18 — World Health Organization officials said Thursday that the five avian flu deaths confirmed this week on Sumatra were probably not a result of human-to-human infection and did not suggest that the virus had mutated into a more deadly form.
Researchers who conducted the study and others familiar with it said the findings suggested Columbus and his men could have carried the nonvenereal tropical bacteria home, where the organisms may have mutated into a more deadly form in the different conditions of Europe.
And that the disease has mutated into a more deadly form that can't be treated with normal drugs?
After the civil war ended, a different, more deadly form of terror set in for the newly freed.
"You add that, then, to the new explosively formed projectiles, which are a much more deadly form that are coming into Iraq from Iran, and the combination has maintained the level of casualties," Pace said, despite advances in U.S. protective gear, tactics and targeting of bomb networks.
Figures released Monday by the Centers for Disease Control and Prevention indicate that a progressive and more deadly form of the disease has reached its highest level in decades in Kentucky, West Virginia and Virginia.
Melanoma, the less common but more deadly form, women often get on their calves but men on the shoulders.
But Henry Niman, a Harvard researcher, says the findings suggest that the real SARS virus is still circulating in Canada and could mutate back into the more deadly form.
