New Delhi: As dengue and chikungunya cases continue to soar, affecting hundreds in the national capital, many doctors in the city hospitals have also fallen prey to the vector-borne diseases. Authorities told IANS on Thursday that they are witnessing a shortage of staff as many doctors, including senior faculty members in many hospitals, have tested positive for dengue and chikungunya, keeping them from discharging their duties. The total number of fatalities in Delhi due to the deadly disease now stands at eight.