Page 116 - Malaysian Journal of Health Promotion, Vol 4 (Supplementary 1) 2022

Malaysian Journal of Health Promotion, Vol 4 (Supplementary 1) 2022
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14 MOH-AMM Scientific Meeting 2022 in conjunction with 23 NIH Scientific Conference Abstract Book
ID 134 ANTIBODY TITERS AMONG COVID-19 POSITIVE RESPONDENTS: FINDINGS FROM
IMSURE

Norzawati Yoep, Mohd Hatta Abdul Mutalip
Institute for Public Health, National Institutes of Health, Ministry of Health Malaysia

INTRODUCTION: COVID-19 pandemic has affected the lives and livelihood of people globally.
More than 523 million people were infected worldwide, with 4.48 million cases from Malaysia.
COVID-19 vaccination protects against SAR-CoV-2 infection at varying degrees. This study
aims to observe the difference in antibody titres among those who were infected with COVID-
19.
METHOD: Data was obtained from Post-vaccination COVID-19 Immunity and Disease
Surveillance in Malaysia (IMSURE). IMSURE is an observational study that employs a cohort
design. The study included 2,513 respondents who were recruited from multiple vaccination
centres nationwide. Analysis was done using SPSS version 24 with complex sample analysis.
RESULTS: At baseline, 100 respondents (4.0%) had past Covid-19 infection. The percentage
was about the same among males and females, with 3.7% and 4.3% respectively. Covid-19
cases were highest among Malays (5.0%) and in the 40-59 years old age group (4.8%). The
mean antibody titre for those with past infection was 19.37 at baseline, significantly higher
compared to those with no prior infection. During second follow up (before the second dose),
the mean antibody titre for those with past infection was also significantly higher (67.09)
compared to the other group. For 3 month and 6 month follow up, there was no significant
difference in the mean antibody titres.
CONCLUSION: Mean antibody titers among those with past Covid-19 infection were
significantly higher during baseline and before the second dose follow up. Prior infection
helped to boost antibody levels among the respondents after vaccination for better
protection.

ID 135 ASSESSING THE FIT OF DIFFERENT RESPIRATOR MODELS AND THE ASSOCIATION
WITH DEMOGRAPHIC FACTORS AND FACIAL SIZES

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Nurul Amalina Khairul Hasni , Rohaida Ismail , Rosnawati Muhamad Robat , Nadia Mohamad , Fatin Amirah
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Suib , Muhammad Alfatih Pahrol , Kamesh Rajendran , Haalah Mahmud , Baderin Osman , Lim Yin Cheng ,
Rafiza Shaharudin 1
1 Environmental Health Research Centre, Institute for Medical Research, Ministry of Health Malaysia
2 Infectious Disease Research Centre, Institute for Medical Research, Ministry of Health Malaysia
3 National Institute of Occupational Safety and Health, Ministry of Human Resources
4 Department of Social and Preventive Medicine, University of Malaya

INTRODUCTION: COVID-19 pandemic has contributed to an increased supply and usage of
N95 respirators in healthcare sectors. Most of the respirators were imported and limited in
size, thus, the suitability for Malaysian remains uncertain. This study aims to compare
respirator fit in several N95 models and its association with demographic factors and facial
sizes.
METHODS: A total of 135 participants from the central and southern region of Malaysia were
involved in this cross-sectional study. Based on facial measurements, participants were
divided into small, medium and large sizes. Quantitative respirator fit testing using Portacount
Machine was performed according to OSHA fit testing protocol. Fit tests were done for three

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