I actually just read some more encouraging news as well. From Wired Science.
"Now, two infectious disease experts from the National Institutes of Health question the idea that severe pandemics are...
Actually you become immune to an infectious disease when your immune system is exposed to the pathogen causing the disease. Sometimes the pathogen changes (like seasonal flu or the common cold) so...
Ravi,
There are 4 different strains of malaria. From the CDC:
"Four species of malaria parasites can infect humans under natural conditions: Plasmodium falciparum, P. vivax, P. ovale and P. malariae...
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