1. Negative impact on the ecosystem 2. Increase in mosquitoes in the environment 3. Negative effects of Wolbachia on human health 4. Irritation/anxiety due to increase in mosquitoes 5. Doubts about the effectiveness of Wolbachia technology in controlling dengue 6. Unknown side effects of Wolbachia (e.g. mutation of mosquitoes) 7. Increase in my overall expenditure on controlling dengue 8. Government/authorities will have to spend more on controlling increased populations of mosquitoes