Correction: IgG antibodies to SARS-CoV-2 in asymptomatic blood donors at two time points in Karachi

• Muhammad Hasan,
• Bushra Moiz,
• Shama Qaiser,
• Kiran Iqbal Masood,
• Zara Ghous,
• Areeba Hussain,
• Natasha Ali,
• J. Pedro Simas,
• Marc Veldhoen,
• Paula Alves,
• Syed Hani Abidi,
• Kulsoom Ghias,
• Erum Khan,
• Zahra Hasan