1. The problem is to rewrite the sentence portion starting from "complications such as..." to improve clarity or style. 2. Original portion: "complications such as dengue hemorrhagic fever and dengue shock syndrome" 3. We can rephrase it to: "severe conditions including dengue hemorrhagic fever and dengue shock syndrome" 4. This maintains the meaning but uses "severe conditions including" instead of "complications such as" for smoother flow. 5. Final rewritten sentence portion: "...can lead to serious severe conditions including dengue hemorrhagic fever and dengue shock syndrome." This completes the requested change.