Design, sample, and setting This is a cross-sectional study using an Internet-based self-administered questionnaire of closed-ended questions and using convenience sampling. In total, 612 undergraduate students completed the survey in Mansoura University.

Data collection Data was collected anonymously through an online questionnaire created using the technology of Google Forms provided by Google ™ and was constructed in Arabic language. The questionnaire consisted of three sections. The first section assessed students' baseline characteristics including sex, age, area of study, academic level, residence, marital status, family members infected, close people infected, and knowing someone who died of the infection.

The second section measured the psychosocial effects of COVID-19 pandemic using two instruments, University of California Los Angeles (UCLA) Loneliness Scale, version 324 and Depression Anxiety Stress Scale (DASS-21).19 The UCLA Loneliness Scale is a widely used self-report instrument of loneliness consisting of 20 items designed to measure both emotional as well as social loneliness. Response of each item was rated on a four-point scale from (1) never to (4) always felt as expressed in each item. Final score ranges from 20 to 80 with higher scores demonstrating higher feelings of loneliness. The scale's reliability was found to be high with alpha coefficients ranging from 0.89 to 0.94 for samples of students. The Arabic version of UCLA Loneliness Scale was used in the current study according to the Arabic translation in Egyptian culture by Daswqee.20 The correlation coefficients values were 0.76 for females and 0.74 for males.

Since December 2019, the novel coronavirus disease 2019 (COVID-19) has spread from Wuhan city to different areas in China and around the world. On 11 March 2020, the World Health Organization (WHO) declared the COVID-19 outbreak a pandemic. On 14 February 2020, the Egyptian Ministry of Health reported the first case of COVID-19. To control the COVID-19 outbreak, the Egyptian government introduced preventive and containment measures with a partial closure starting on 25 March. On 31 March, Egypt pronounced 710 COVID-19 cases and 46 related deaths with a mortality rate of 6.48%. As on 06 June 2020, there were 1497 new cases with total cases of 32 612, a total of 1198 deaths and 8538 full recovery. Generally, several potential stressors were caused by the pandemic that might lead to psychological distress and life dissatisfaction. Individuals' overall assessments of their psychological wellbeing and quality of life are referred to as life satisfaction. Psychological distress takes the shape of a negative emotion, which contrasts with life contentment. It refers to people's unfavorable emotional reactions to several stimuli, which might include tension, dread, worry and psychological instability.

Inclusion Criteria:

- All available adults can fill in online surveys.

Exclusion Criteria:

- Children under 18 years.

- adults (18 years and above) in all regions of Egypt who were willing to participate in the study. The study adopted an online survey, and the study population may not reflect the actual pattern of the general population.