Public health outbreaks, epidemics or pandemics, such as the COVID-19 pandemic, could materially adversely impact our business. In December 2019, a novel strain of coronavirus (COVID-19) was reported to have emerged in Wuhan, China. COVID-19 has since spread to most of the countries around the globe, including every state in Brazil. On March 11, 2020, the World Health Organization declared the COVID-19 outbreak a pandemic, and on March 20, 2020, the Brazilian federal government declared a national emergency with respect to COVID-19, which remained in place until December 31, 2020.
The global COVID-19 outbreak is an unprecedented and rapidly evolving situation. The effect on our operations is still highly uncertain and cannot be predicted with confidence. The spread of COVID-19, or actions taken to mitigate its spread, has and may continue to have material and adverse effects on our ability to operate effectively. We may be required to completely or partially close facilities, and we may suffer labor shortages, particularly of our teaching faculty, which is mostly composed of doctors who continue to work shifts at hospitals and are consequently more exposed to COVID-19 than non-medical administrative staff. Likewise, we may suffer financial and reputational harm were an outbreak to occur among our students, as our students participating in in-person hospital and healthcare residency programs are more exposed to COVID-19 than our students who are currently partaking in educational activities solely via our online platform. We may not be able to provide online classes to our students and keep them engaged with online classes during the COVID-19 pandemic or resume on-campus practical classes for the majority of our medical students during the COVID-19 pandemic. Factors that have affected and will continue influencing the effect on our operations, most of which are outside of our control, include the economic consequences and duration of the outbreak, new information that emerges concerning the severity of COVID-19 and actions taken to contain the outbreak or treat its impact, among others. The extent of the adverse effect on our operations, including, among others, the regular functioning of our facilities, will depend on the extent and severity of the continued spread of COVID-19 in Brazil. Since March 17, 2020, there have been interruptions of our on-campus activities due to Brazilian government authorities' mandatory lockdowns, which remained in place until December 31, 2020 to varying degrees depending on the region of Brazil, with a significant portion of our nonpractical educational activities being temporarily offered through our online platform (rather than on-site), and the calendar of our practical educational activities being rescheduled to when authorities will allow on-campus activities to resume.
In response to the impact of the COVID-19 pandemic, we assessed whether we had satisfied all of our contracts containing customer performance obligations in accordance with IFRS 15, and concluded it was necessary to defer a portion of our net revenue for the second half of 2020. We were able to manage, replace and reschedule these activities so that all of our performance obligations were satisfied and we recognized these revenues from customers. Some of our second half practical educational activities (particularly for students in the first to fourth years) will need to be replaced during the first half of 2021. Therefore, a portion of our revenue recognition has been postponed.
By December 31, 2020, the States of Rio de Janeiro, Pará, Tocantins, Piauí, Rondonia, Maranhão, Bahia and Paraíba had issued state decrees granting discounts to all students in such states, and we consequently granted mandatory discounts to our students totaling R$6.5 million. As of the date of this annual report, except in the case of Paraíba state, these mandatory discounts have been suspended as their constitutionality has been challenged in the superior courts. The laws of the states of Bahia and Maranhão on the reduction of tuition fees in private educational institutions were ruled as unconstitutional by the Brazilian Federal Supreme Court in December 2020. Additionally, we are also facing individual and collective legal proceedings all across the country. For further information, see "Item 6. Directors, Senior Management and Employees-A. Directors and Senior Management-Legal Proceedings."
The COVID-19 pandemic is still evolving, and Brazilian authorities may maintain a lockdown of our on-campus activities for an undefined extended period of time or impose a more severe lockdown, among other measures, all of which are outside of our control and may materially adversely affect our business, financial condition, results of operations and cash flows for an extended period of time. We may also suffer labor shortages, particularly of our teaching faculty, which is mostly composed of doctors that continue to have work shifts at hospitals and are consequently more exposed to COVID-19 than non-medical administrative staff. The COVID-19 pandemic is expected to cause a material and adverse effect on the general economic, financial, political, demographic and business conditions in Brazil, which may reduce the disposable income of our students and their families, and consequently (i) result in an adverse impact on the ability of our students (current and/or prospective) to pay our tuition fees and/or (ii) trigger an increase in our attrition rates.
As a result, it is still uncertain whether or not the pandemic will lead to a risk of an increase in impairment of our financial assets and a reduction of our cash generation and the recoverable amounts of our cash-generating units.
In addition, the impact of the COVID-19 pandemic amplifies the risk that disruptions in public and private infrastructure, including communications and financial services, could materially and adversely disrupt our normal business operations. We have transitioned a significant subset of our employees to a remote work environment in an effort to mitigate the spread of COVID-19, which may exacerbate certain risks to our business, including an increased demand for information technology resources, increased risk of phishing and other cybersecurity attacks, and increased risk of unauthorized dissemination of personal information, sensitive personal information or proprietary or confidential information about us or our customers or other third parties. Further, we process personal data, and we therefore will be subject to the Brazilian Data Protection Law (Lei Geral de Proteção de Dados, or LGPD). Considering that our processing of personal data has increased as a result of the measures we adopted due to the COVID-19 pandemic, if we fail to comply with any provisions provided for in the LGPD, we could be subject to lawsuits filed by the data subjects, public authorities and private associations, including those for compensation for damages arising from the violation of the data subjects' rights, and we could be subject to the penalties provided for not only in the LGPD, but also in sectorial legislation, such as the Brazilian Consumer Defense and Protection Code (Código de Defesa do Consumidor) and the Brazilian Civil Framework of the Internet (Marco Civil da Internet). If we do not comply with the LGPD and are in turn subject to sanctions, we may suffer financial and reputational losses, which may adversely affect our financial results. See "Item 3. Key Information-D. Risk Factors-Certain Risks Relating to Our Business and Industry-Failure to prevent or detect a malicious cyber-attack on our systems and databases could result in a misappropriation of confidential information or access to highly sensitive information," "Item 3. Key Information-D. Risk Factors-Certain Risks Relating to Our Business and Industry-Our success depends on our ability to monitor and adapt to technological changes in the education sector and maintain a technological infrastructure that works adequately and without interruption," and "Item 3. Key Information-D. Risk Factors-Certain Risks Relating to Our Business and Industry-Failure to comply with data privacy regulations could result in reputational damage to our brands and adversely affect our business, financial condition and results of operations."
The rapid development and fluidity of this situation precludes our ability to predict the ultimate adverse impact of COVID-19 on us. We are continuing to monitor the spread of the COVID-19 and related risks. There are no comparable recent events that may provide guidance as to the effect of the spread of COVID-19 pandemic, and, as a result, the ultimate impact of the COVID-19 pandemic is highly uncertain and subject to change.