Not all mozzies carry the parasite , and most of the time the prophylaxis will keep you healthy. But not always, and there are rare cases of infection many many months (even years) after initial exposure. Its why I am never allowed to donate blood again, they wont take the risk of transmission to the recipient. Anyways I babble, Just do what you can to not get it. The first symptoms for me both times was a migraine, which I have never had before. About 12hrs before the rest of the parade , sweats, chills, vomiting, and diarrhea all uncontrollable. Make your worst hangover seem like a cocktail hour . The treatment is worse.
It wont likely kill you in the modern world , but you'll wish it had during the dance.
Regards
Pat