The pathogenic strains, which infect humans, have a mortality rate of up to 100 percent in as little as 48 hours.
There are nearly one million doctor visits to the U.S. every year for keratitis.
Norovirus is the leading cause of food poisoning outbreaks in the U.S. and it sickens at least 20 million Americans a year with vomiting and diarrhea.
The study concluded that these rare mutations resulted in a 50 percent lower risk of a heart attack.
While Rothbauer spent 10 days in a medically induced coma and another six days in the cardiac unit of the same hospital, she unwittingly racked up over $100,000 in health care bills.
In particular, there was a high concentration of suicide risk in the top five percent of highest-risk hospitalizations.
With lung cancer killing nearly 160,000 Americans per year, screening those that are at a higher risk could help cut the mortality rate by 20 percent.
The findings show that regular smokers of marijuana have, on average, a smaller brain than those who have never used marijuana.
Generally, exposure was due to ingestion, with 4.4 percent hospitalized and 7.5 percent experiencing a moderate or major medical outcome.
It is estimated that at least 20 percent of new infections occur during the burial process.