Explanation:

Recently, Researchers from the World Mosquito Program have used mosquitoes infected with Wolbachia bacteria to successfully control dengue in Yogyakarta city of Indonesia. 

• Wolbachia are natural bacteria present in up to 60% of insect species, including some mosquitoes. 
• However, Wolbachia is not usually found in the Aedes aegypti mosquito, the primary species responsible for transmitting human viruses such as Zika, dengue, chikungunya and yellow fever.
• Wolbachia is safe for humans, animals and the environment.

Hence both statements are correct.