Which one of the following conditions though harmful in itself ,is also a potential saviour from a mosqutio borne infectious disease?

Which one of the following conditions through harmful in itself, is also a potential saviour from mosquito borne pernicious malaria due to Plasmodium falciparium?

Which one of the following conditions through harmful in itself, is also a potential saviour from mosquito borne pernicious malaria due to Plasmodium falciparium?

Which one of the following conditions through harmful in itself, is also a potential saviour from mosquito borne pernicious malaria due to Plasmodium falciparium?

Which one of the following conditions through harmful in itself, is also a potential saviour from mosquito borne pernicious malaria due to Plasmodium falciparium?

A harmful condition which is also potential saviour form a mosquito borne infectious disease

Which one of the following in water-borne disease?