The COVID-19 has no known curative therapeutic agent, and neither is there a potent vaccine available in its prevention. It is therefore imperative to take preventive measures to limit the spread of the infection (
22). Non-pharmaceutical interventions can reduce the transmission of diseases whose mode of transmission is via droplet contact, direct physical contact, and indirect physical contact (e.g., by touching a surface contaminated with virus, usually in fomites) (
16). Its use dates as far back as the 1918 - 1919 influenza pandemic, during which a number of United States cities implemented home quarantine for infected persons, social distancing, and a reduction in public gatherings such as church meetings and closure of schools (
23). The COVID-19 pandemic is still ongoing, and it is too early to make categorical statements on the success or otherwise of NPI in preventing the spread of the disease.
This study assessed the use of NPIs in curbing the spread of COVID-19 in a metropolis in North Central Nigeria. The interventions assessed were social distancing and face mask use. Results from the study suggest that participants had a good knowledge of the concept of SD. This finding is similar to the results of a survey conducted among 1750 households in Delhi, a metropolitan city in India, in which participants demonstrated an equally good knowledge of SD, with about 85% of the participants in the study attesting to the efficacy of this interventional strategy in preventing COVID-19 spread (
24). The good knowledge displayed by participants may stem from the availability of information on media, print, and non-print, which many people have access, to most especially social media. This also may be the probable reason for the younger individuals less than 30 years of age having a better knowledge on the subject than older age groups as they spend more time surfing the social media.
The face mask serves as a means of source control when worn by an infected person and at the same time a protective tool to the uninfected, protecting them from the virus peradventure they come in contact with an infected individual (
25). Its use, though unmistakably necessary, needs to be correctly and consistently done. To achieve this, the individual needs to have the right perception about the face mask, resulting in a positive attitude concerning its usage. A wrongly worn face mask is as good as not using it at all, while the incorrect handling of the mask while worn and after removal is equally as dangerous as not wearing, as the virus SARS CoV2 has been seen to persist on the face mask surface for up to seven days (
26). The incorrect use and disposal of face masks may actually increase the rate of transmission (
27).
The attitude of participants towards wearing face masks was generally a positive one, though many were occasional users. Its limited usage despite a positive attitude might stem from low risk perception about COVID-19 drawn from the low disease incidence reported in Africa compared to other parts of the world (
28). This finding corroborates the result from a previous study conducted in Jordan in which participants a demonstrated positive attitude towards face mask wearing as a measure for preventing COVID-19 (
29).
Reasons for the inconsistent or non-usage of face masks include feeling uncomfortable while wearing and its negative impact on breathing. These were some of the reasons highlighted in a study on face mask perception and face mask wearing (
22). In that study, gender was noted to significantly influence face mask perception hence positive attitude to its use, as seen in our study. Gender and age likewise influenced achieving a good knowledge about social distancing. Other reasons for the low uptake were the belief that those who wear a mask are infected with the virus and a lack of confidence in the efficacy of the mask in preventing the infection. This could be as a result of mistrust in science and government rolling out policies, with the belief that the policies are for personal interest and marred with corruption (
30). The use of mask is still being stigmatized in numerous countries, with wearers being labeled as infected (
31).
Cloth masks were favored for use in low-income countries due to their ease of production, availability of material for its use, and its low cost. It is meant to offer barrier to the entry of the virus hence reducing the rate and likelihood of transmission through the performance of this type of mask is less than the surgical mask or the respirators. Studies have shown that community transmission could be reduced if everyone, asymptomatic or symptomatic, used face masks (
29). It is particularly essential for all in countries like ours where testing coverage is still low. Asymptomatic, pre-symptomatic, and those with mild symptoms will continue to mingle with others in the community, transmitting infection to them.
5.1. Conclusions
Participants have good knowledge of social distancing even though not widely practiced and demonstrate positive attitude towards wearing face masks as a measure of preventing the spread of COVID-19, though it is not consistently and correctly worn. Intensified efforts in education on the right use and essence of these interventions is strongly recommended, preferably in the local and pidgin languages, for the information to be well understood and internalized.